National Toxicology Program

National Toxicology Program

How NTP Studies are Used to Protect Human Health

http://ntp.niehs.nih.gov/go/regact

Federal and State Regulatory Agencies use the NTP study data in considering the need for regulation of specific chemicals to protect human health.

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Agency for Toxic Substances and Disease Registry
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Notice Identification of Priority Data Needs for Two Priority Hazardous Substances Request for public comments on the identification of priority data needs for two priority hazardous substances, and an ongoing call for voluntary research proposals.

September 8, 2006 -- 71 FR 53102
A Tri-Agency Superfund Applied Research Committee (TASARC) comprised of scientists from ATSDR, the National Toxicology Program (NTP), and EPA, will review all proposals. N/A
Notice Availability of Draft Toxicological Profiles The Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), as amended by the Superfund Amendments and Reauthorization Act of 1986 (SARA), Section 104(i)(3) [42 U.S.C. 9604(i)(3)] directs the Administrator of ATSDR to prepare toxicological profiles of priority hazardous substances and to revise and publish each updated toxicological profile as necessary. This notice announces the availability of the 20th set of toxicological profiles, which consists of one new draft and six updated drafts, prepared by ATSDR for review and comment.

October 18, 2006 -- 71 FR 61479
The profiles must also include a determination of whether adequate information on the health effects of each substance is available or in the process of development. When adequate information is not available, ATSDR, in cooperation with the National Toxicology Program (NTP), is required to assure the initiation of research to determine these health effects. N/A
Notice Intent To Develop Two Interaction Profiles This notice announces the intent of ATSDR to develop two interaction profiles.

July 3, 2007 -- 72 FR 36456
Where such information is not available or under development, ATSDR shall, in cooperation with the National Toxicology Program, initiate a program of research to determine these health effects. N/A
Notice Availability of Draft Toxicological Profiles The Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), as amended by the Superfund Amendments and Reauthorization Act of 1986 (SARA), Section 104(i)(3) [42 U.S.C. 9604(i)(3)], directs the Administrator of ATSDR to prepare toxicological profiles of priority hazardous substances and to revise and publish each updated toxicological profile as necessary. This notice announces the availability of the 22nd set of toxicological profiles, which consists of four updated drafts prepared by ATSDR for review and comment. The toxicological profiles for formaldehyde and perfluoroalkyls are on a modified schedule pending additional review.

November 6, 2008 -- 73 FR 66047
The profiles must also include a determination of whether adequate information on the health effects of each substance is available or in the process of development. When adequate information is not available, ATSDR, in cooperation with the National Toxicology Program (NTP), is required to ensure the initiation of research to determine these health effects. NA
Notice Announcement of Final Priority Data Needs for Two Priority Hazardous Substances This notice announces the final priority data needs for two priority hazardous substances as part of the continuing development and implementation of the ATSDR Substance-Specific Applied Research Program (SSARP). The notice also serves as a continuous call for voluntary research proposals.

January 9, 2009 -- 74 FR 900
A Tri-Agency Superfund Applied Research Committee (TASARC), comprised of scientists from ATSDR, the National Toxicology Program (NTP), and EPA will review all proposals. NA
Notice Availability of Draft Toxicological Profile for Perfluoroalkyls This notice announces the availability of the draft toxicological profile for perfluoroalkyls, prepared by ATSDR, for review and comment.

July 23, 2009 -- 74 FR 36492
NTP in conjunction with ATSDR and EPA identified categories of possible data needs addressed in the draft profile. The NTP's carcinogenicity study of PFOA is mentioned in the section on ongoing studies. (PFOA) 335-67-1
Notice Announcement of Final Priority Data Needs for Six Priority Hazardous Substances This notice announces the final priority data needs for six priority hazardous substances as part of the continuing development and implementation of the ATSDR Substance-Specific Applied Research Program (SSARP). This notice also serves as a continuous call for voluntary research proposals. A Tri-Agency Superfund Applied Research Committee (TASARC), comprised of scientists from ATSDR, NTP, EPA, FDA, and NIOSH, will review all proposals.

October 27, 2009 -- 74 FR 55240
The priority data needs for six substances are included in the ATSDR Priority List of Hazardous Substances (73 FR 12178, March 6, 2008). ATSDR initially announced these priority data needs in the Federal Register on December 28, 2007 (72 FR 73828). EPA, the National Institute of Environmental Health Sciences (NIEHS)/National Toxicology Program (NTP), the National Institute for Occupational Safety and Health (NIOSH), and the U.S. Food and Drug Administration/National Center for Toxicological Research (FDA/NCTR) reviewed the six priority data needs and accompanying documents. The mechanisms described in the "Implementation of Substance-Specific Applied Research Program" section of this Federal Register Notice address these data needs. NA
Total Notices 7


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California Office of Environmental Health
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Notice Chemicals Listed Effective May 1, 1997 as Known to the State to Cause Cancer or Reproductive Toxicity: 9 chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added nine chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). These chemicals are listed effective May 1, 1997. Toxicological Endpoint: Cancer

May 1, 1997 -- Proposition 65
National Toxicology Program (NTP, 1995a). Toxicology and Carcinogenesis Studies of Nitromethane (CAS No. 72-52-5) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). Board Draft. NTP Technical Report Series No. 461. NTIS Publication No. 95-3377. 75-52-5
Notice Chemicals Listed Effective May 1, 1997 as Known to the State to Cause Cancer or Reproductive Toxicity: 9 chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added nine chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). These chemicals are listed effective May 1, 1997. Toxicological Endpoint: Cancer

May 1, 1997 -- Proposition 65
National Toxicology Program (NTP, 1995b). Toxicology and Carcinogenesis Studies of Tetrafluoroethylene (CAS No. 116-14-3) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). Board Draft. NTP Technical Report Series No. 450. NTIS Publication No. 95-3366. 75-02-5
Notice Chemicals Listed Effective August 26, 1997 as Known to the State to Cause Cancer or Reproductive Toxicity: 16 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 18 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective August 26, 1997. Toxicological Endpoint: Cancer

August 15, 1997 -- Proposition 65
National Toxicology Program (NTP, 1994a). Toxicology and Carcinogenesis Studies of 1-amino-2,4-dibromoanthraquinone (CAS No. 81-49-2) in F344/N Rats and B6C3F1 Mice (Feed Studies). Board Draft. NTP Technical Report Series No. 383. NTIS Publication No. 94-2838. 81-49-2
Notice Chemicals Listed Effective August 26, 1997 as Known to the State to Cause Cancer or Reproductive Toxicity: 16 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 18 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective August 26, 1997. Toxicological Endpoint: Cancer

August 15, 1997 -- Proposition 65
National Toxicology Program (NTP, 1994b). Toxicology and Carcinogenesis Studies of C.I. Direct Blue 218 (CAS No. 28407-37-6) in F344/N Rats and B6C3F1 Mice (Feed Studies). NTP Technical Report Series No. 430. NTIS Publication No. 94-3161. 28407-37-6
Notice Chemicals Listed Effective August 26, 1997 as Known to the State to Cause Cancer or Reproductive Toxicity: 16 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 18 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective August 26, 1997. Toxicological Endpoint: Cancer

August 15, 1997 -- Proposition 65
National Toxicology Program (NTP, 1992). Toxicology and Carcinogenesis Studies of C.I. Direct Blue 15 (CAS No. 2429-74-5) in F344/N Rats and B6C3F1 Mice (DrinkingWater Studies). NTP Technical Report Series No. 397. NTIS Publication No. 92-2852. 2429-74-5
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1996a). NTP Technical Report on Comparative Toxicity and Carcinogenicity Studies of o-Nitrotoluene and o-Toluidine Hydrochloride (CAS Nos. 88-72-2 and 636-21-5). Administered in Feed to Male F344/N Rats. NTP Toxicity Report Series No. 44. NTIS Publication Number 96-3936. 88-72-2
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1982a). Carcinogenesis Bioassay of C.I. Solvent Yellow 14 (CAS No. 842-07-9) in F344/N Rats and B6C3F1 Mice (Feed Study). NTP Technical Report Series No. 226. NTIS Publication No. 82-1782. 842-07-9
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1987). Toxicology and Carcinogenesis Studies of Methyl Carbamate (CAS No. 598-55-0) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP Technical Report Series No. 328. NTIS Publication No. 88-2584. 598-55-0
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1996b). Toxicology and Carcinogenesis Studies of Phenolphthalein (CAS No. 77-09-8) in F344/N Rats and B6C3F1 Mice (Feed Studies). NTP Technical Report Series No. 465. NTIS Publication No. 97-3390. 77-09-8
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1981). Carcinogenesis Bioassay of Cytembena (CAS No. 21739-91-3). NTP Technical Report Series No. 207. NTIS Publication No. 81-1763. 21739-91-3
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1989a). Toxicology and Carcinogenesis Studies of para-Chloroaniline Hydrochloride (CAS No. 20265-96-7) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP Technical Report Series No. 351. 20265-96-7
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1989b). Toxicology and Carcinogenesis Studies of Nalidixic Acid (CAS No. 389-08-2) in F344/N Rats and B6C3F1 Mice (Feed Studies). NTP Technical Report Series No. 368. NTIS Publication No. 90-2823. 389-08-2
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1994). Seventh Annual Report on Carcinogens: 1994. Volume 1: 357-362. US Department of Health and Human Services, NTP, Research Triangle Park, NC. 612-83-9
Notice Notice to Interested Parties Chemicals Listed Effective May 15, 1998 as Known to the State to Cause Cancer or Reproductive Toxicity: 28 Chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency has added 28 chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity, for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 or the Act). These chemicals are listed effective May 15, 1998. Toxicological Endpoint: Cancer

May 15, 1998 -- Proposition 65
National Toxicology Program (NTP, 1997). Toxicology and Carcinogenesis Studies of Salicylazosulfapyridine (CAS No. 599-79-1) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP Technical Report Series No. 457. NTIS Publication No. 97-3373. 599-79-1
Notice Chemicals Listed Effective June 2, 2000 as Known to the State to Cause Cancer: Chloroprene, Cobalt sulfate heptahydrate, and Fenoxycarb The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding three chemicals to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The chemicals are listed effective June 2, 2000 pursuant to an administrative listing mechanism provided under Proposition 65, based upon a formal identification by an authoritative body that the chemical causes cancer.

June 22, 2000 -- Proposition 65
National Toxicology Program (NTP, 1998a). Toxicology and Carcinogenesis Studies of Chloroprene (CAS No. 126-99-8) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). Board Draft. NTP Technical Report Series No. 467 NTIS Publication No. 98-3957. 126-99-8
Notice Chemicals Listed Effective June 2, 2000 as Known to the State to Cause Cancer: Chloroprene, Cobalt sulfate heptahydrate, and Fenoxycarb The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding three chemicals to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The chemicals are listed effective June 2, 2000 pursuant to an administrative listing mechanism provided under Proposition 65, based upon a formal identification by an authoritative body that the chemical causes cancer.

June 22, 2000 -- Proposition 65
National Toxicology Program (NTP, 1996). Toxicology and Carcinogenesis Studies of Isobutyl Nitrite (CAS No.542-56-3) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). NTP Technical Report Series No. 448. 10026-24-1
Notice Chemicals Listed Effective December 22, 2000 as Known to the State of California to Cause Cancer or Reproductive Toxicity: Bromoethane, and 4 others The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding five chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The chemicals are listed effective December 22, 2000. Bromoethane and isoxaflutole are listed pursuant to an administrative listing mechanism provided under Proposition 65, based upon a formal identification by an authoritative body that the chemicals cause cancer.

December 22, 2000 -- Proposition 65
National Toxicology Program (NTP, 1989). Toxicology and Carcinogenesis Studies of Bromoethane (Ethyl Bromide) (CAS No. 74-96-4) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). NTP Technical Report Series No. 363 NTIS Publication No. 90-2818. 74-96-4
Notice Chemicals Listed Effective February 23, 2001 as Known to the State to Cause Cancer or Reproductive Toxicity: 13 chemicals The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding thirteen chemicals to the list of chemicals known to the State to cause cancer or reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The chemicals are listed effective February 27, 2001. Ethoprop, indium phosphide, lynestrenol, norethynodrel, and propachlor are listed pursuant to an administrative listing mechanism provided under Proposition 65, based upon a formal identification by an authoritative body that the chemicals cause cancer.

February 23, 2001 -- Proposition 65
National Toxicology Program (NTP, 2000a). Toxicology and Carcinogenesis Studies of Indium Phosphide (CAS No. 22398-80-7) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). Board Draft. NTP Technical Report Series No. 499. NTIS Publication No. 00-4433. 22398-80-7
Notice Chemicals Delisted Effective April 6, 2001 as Known to the State to Cause Cancer The California Environmental Protection Agency's Office of Environmental Health Hazard Assessment (OEHHA) is the lead agency for the implementation of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). As the lead agency, OEHHA is removing saccharin from the list of chemicals known to the state to cause cancer, for purposes of Proposition 65. Saccharin [CAS No. 81-07-2] was originally added to the Proposition 65 list on October 1, 1989. This chemical was added to the Proposition 65 list as a result of the issuance of a judicial decision enforcing Labor Code Section 6382(b)(1) and (d) which are incorporated by reference as Proposition 65 listing provisions pursuant to Health and Safety Code Section 25249.8(b). Labor Code Section 6382(b)(1) requires inclusion of substances listed as human or animal carcinogens by the International Agency for Research on Cancer (IARC). Labor Code Section 6382(d) requires the inclusion of chemicals identified as carcinogens or potential carcinogens by IARC or the National Toxicology Program (NTP). Saccharin was identified by IARC and NTP as causing cancer.

April 6, 2001 -- Proposition 65
In 2000, NTP released its Ninth Report on Carcinogens in which it delisted saccharin [CAS No. 81 07-2] from the list of substances reasonably anticipated to be a human carcinogen. 
National Toxicology Program (NTP, 2000). Report on Carcinogens, Ninth Edition: Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service, NTP, Research Triangle Park, NC.
81-07-2
Notice Chemical Listed Effective November 16, 2001 as Known to the State of California to Cause Cancer: Methyleugenol The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding the chemical methyleugenol to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The chemical is listed effective November 16, 2001. Toxicological Endpoint: Cancer

November 16, 2001 -- Proposition 65
National Toxicology Program (NTP, 2000a). Toxicology and Carcinogenesis Studies ofMethyleugenol (CAS No. 93-15-2) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP Technical Report Series No. 491 NIH Publication No. 00-3950. 93-15-2
Notice Chemical Listed Effective April 19, 2002 as Known to the State of California to Cause Cancer: Naphthalene The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding naphthalene to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The listing of naphthalene is effective April 19, 2002. Toxicological Endpoint: Cancer

April 19, 2002 -- Proposition 65
National Toxicology Program (NTP, 2000). Toxicology and Carcinogenesis Studies of Naphthalene (CAS No. 91-20-3) in F344/N Rats (Inhalation Studies). NTP Technical Report Series No. 500. NIH Publication No. 01-4434. 91-20-3
Notice Chemical Listed Effective May 17, 2002 as Known to the State of California to Cause Cancer: Pyridine The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding pyridine to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The listing of pyridine is effective May 17, 2002. Toxicological Endpoint: Cancer

May 17, 2002 -- Proposition 65
National Toxicology Program (NTP, 2000). Toxicology and Carcinogenesis Studies of Pyridine (CAS No. 110-86-1) in F344/N Rats, Wistar Rats and B6C3F1 Mice (Drinking Water Studies). NTP Technical Report Series No. 470. NIH Publication No. 97-3960. 110-86-1
Notice Chemical Listed Effective March 14, 2003 as Known to the State of California to Cause Cancer: Strong Inorganic Acid Mists Containing Sulfuric Acid The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding strong inorganic acid mists containing sulfuric acid to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The listing of strong inorganic acid mists containing sulfuric acid is effective March 14, 2003. Toxicological Endpoint: Cancer

March 14, 2003 -- Proposition 65
National Toxicology Program (NTP, 2000). Report on Carcinogens, Ninth Edition: Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service, NTP, Research Triangle Park, NC. 7664-93-9 (Mists containing)
Notice Announcement of Publication of the Final Technical Support Documents for Public Health Goals for 11 Chemicals in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the availability of the final technical support documents for a Public Health Goal (PHG) for each of the following eleven (11) chemicals in drinking water.

September 26, 2003 -- Public Health Goals
NTP (1983). Lifetime carcinogenesis studies of amosite asbestos (CAS No. 12172-73-5) in Syrian golden hamsters (feed studies). Tech report series No. 249.

NTP (1985). Toxicology and carcinogenesis studies of chrysotile asbestos (CAS No. 12001-29-5) in F344/N rats (feed studies ). Tech report series No. 295.

NTP (1988). Toxicology and carcinogenesis studies of crocidolite asbestos (CAS No. 12001-28-4) in F344/N rats (feed studies). Tech report series No. 280.

NTP (1990a). Lifetime carcinogenesis studies of chrysotile asbestos (CAS No. 12001- 29-5) in Syrian golden hamsters (feed studies). Tech report series No. 246.

NTP (1990b). Toxicology and carcinogenesis series of amosite asbestos in F344/N rats. Tech report series No. 279.

NTP (1990c). Technical Report on the toxicology and carcinogenesis studies of tremolite (CAS No. 14567-73-8) in Fischer 344 rats (feed studies). Tech report series No. 277.

NTP (2000). Asbestos. CAS No. 1332-21-4. Ninth Report on Carcinogens

1332-21-4
Notice Announcement of Publication of the Final Technical Support Documents for Public Health Goals for 11 Chemicals in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the availability of the final technical support documents for a Public Health Goal (PHG) for each of the following eleven (11) chemicals in drinking water.

September 26, 2003 -- Public Health Goals
NTP (1982). Carcinogenesis bioassay of di(2-ethylhexyl)adipate (CAS No. 103-23-1) in F344 Rats and B6C3F1 Mice (Feed Study). Technical Report, Series No. 212. 103-23-1
Notice Announcement of Publication of the Final Technical Support Documents for Public Health Goals for 11 Chemicals in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the availability of the final technical support documents for a Public Health Goal (PHG) for each of the following eleven (11) chemicals in drinking water. (barium)

September 26, 2003 -- Public Health Goals
NTP (1994). Technical report on the toxicology and carcinogenesis studies of barium chloride dihydrate (CAS No. 10326-27-9) in F344/N rats and B6C3F1 mice. TR-432 10326-27-9
Notice Announcement of Publication of the Final Technical Support Documents for Public Health Goals for 11 Chemicals in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the availability of the final technical support documents for a Public Health Goal (PHG) for each of the following eleven (11) chemicals in drinking water.

September 26, 2003 -- Public Health Goals
NTP (1982). Carcinogenesis bioassay of 1,2-dibromoethane in F344 rats and B6C3F1 mice (inhalation study). Technical report No. 210. 106-93-4
Notice Announcement of Publication of the Final Technical Support Documents for Public Health Goals for 11 Chemicals in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the availability of the final technical support documents for a Public Health Goal (PHG) for each of the following eleven (11) chemicals in drinking water.

September 26, 2003 -- Public Health Goals
NTP (1985). Technical Report on the Toxicology and Carcinogenesis Studies of Chlorobenzene (CAS No. 108-90-7) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP TR 261. 108-90-7
Notice Chemical Listed Effective November 14, 2003 as Known to the State of California to Cause Cancer: Fumonisin B1 The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding fumonisin B1 to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The listing of fumonisin B1 is effective November 14, 2003 Toxicological Endpoint: Cancer

November 14, 2003 -- Proposition 65
National Toxicology Program (NTP, 2001). Toxicology and Carcinogenesis Studies of Fumonisin B1 (CAS No. 116355-83-0) in F344/N Rats and B6C3F1 Mice (Feed Studies). NTP Technical Report Series No. 496, NIH Publication No. 01-3955 116355-83-0
Notice Announcement of Publication of the Final Public Health Goal for Arsenic in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the publication of the final Public Health Goal (PHG) for arsenic.

April 23, 2004 -- Public Health Goals
NTP (1989). Toxicology and Carcinogenesis Studies of Roxarsone (CAS No. 121-19-7) in F344/N Rats and B6C3F1 Mice (Feed Studies). TR-345. 121-19-7
Notice Chemical Listed Effective May 7, 2004 as known to the State of California to Cause Cancer: Nickel Compounds The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding nickel compounds to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5, Proposition 65). The listing of nickel compounds is effective May 7, 2004. Toxicological Endpoint: Cancer

May 7, 2004 -- Proposition 65
NTP released its Tenth Report on Carcinogens in 2002 in which it included nickel compounds on the list of substances as known to be human carcinogens. 
National Toxicology Program (NTP, 2002). Report on Carcinogens, Tenth Edition. Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service. National Institute of Environmental Health Sciences, Research Triangle Park, NC.
Nickel compounds
Notice Chemicals Listed Effective June 11, 2004 as Known to the State of California to Cause Cancer: 3,3'-dimethoxybenzidine-based dyes metabolized to 3,3'-dimethoxybenzidine The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding 3,3'-dimethoxybenzidine-based dyes metabolized to 3,3'-dimethoxybenzidine, 3,3'-dimethylbenzidine-based dyes metabolized to 3,3'-dimethylbenzidine, ethylbenzene, propylene glycol mono-t-butyl ether, and thiouracil to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., Proposition 65). The listing of these chemicals is effective June 11, 2004. Toxicological Endpoint: Cancer

June 11, 2004 -- Proposition 65
National Toxicology Program (NTP, 2002). Tenth Report on Carcinogens. Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service. National Institute of Environmental Health Sciences, Research Triangle Park, NC. DMOB based dyes
Notice Chemicals Listed Effective June 11, 2004 as Known to the State of California to Cause Cancer: propylene glycol mono-t-butyl ether The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding 3,3'-dimethoxybenzidine-(DMOB)based dyes metabolized to 3,3'-dimethoxybenzidine, 3,3'-dimethylbenzidine- (DMB)based dyes metabolized to 3,3'-dimethylbenzidine, ethylbenzene, propylene glycol mono-t-butyl ether, and thiouracil to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., Proposition 65). The listing of these chemicals is effective June 11, 2004. Toxicological Endpoint: Cancer

June 11, 2004 -- Proposition 65
National Toxicology Program (NTP, 2004). Toxicology and Carcinogenesis Studies of Propylene Glycol Mono-t-Butyl Ether (CAS No. 57018-52-7) In F344/N Rats and B6C3F1 Mice and a Toxicology Study of Propylene Glycol Mono-t-Butyl Ether In Male NBR Rats (Inhalation Studies). NTP Technical Report Series No. 515. NIH Publication No. 04-4449 57018-52-7
Notice Chemicals Listed Effective June 11, 2004 as Known to the State of California to Cause Cancer: 3,3'-dimethylbenzidine (DMB)-based dyes metabolized to 3,3'-dimethylbenzidine The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding 3,3'-dimethoxybenzidine-(DMOB)based dyes metabolized to 3,3'-dimethoxybenzidine, 3,3'-dimethylbenzidine- (DMB)based dyes metabolized to 3,3'-dimethylbenzidine, ethylbenzene, propylene glycol mono-t-butyl ether, and thiouracil to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., Proposition 65). The listing of these chemicals is effective June 11, 2004. Toxicological Endpoint: Cancer

June 11, 2004 -- Proposition 65
National Toxicology Program (NTP, 2002). Tenth Report on Carcinogens. Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service. National Institute of Environmental Health Sciences, Research Triangle Park, NC. DMB based dyes
Notice Chemicals Listed Effective July 9, 2004 as Known to the State of California to Cause Cancer: aristolochic acids and herbal remedies containing plant species of the genus Aristolochia The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding aristolochic acids and herbal remedies containing plant species of the genus Aristolochia to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5, Proposition 65). The listing of "aristolochic acids and herbal remedies containing plant species of the genus Aristolochia is effective July 9, 2004. Toxicological Endpoint: Cancer

July 9, 2004 -- Proposition 65
Health and Safety Code section 25249.8(a) requires that certain substances identified by the International Agency for Research on Cancer (IARC) or the National Toxicology Program (NTP), as described in Labor Code sections 6382(b)(1) and (d), be included on the Proposition 65 list. 
Aristolochic acid related exposures are current candidate substances under review for the NTP Twelfth Edition, Report on Carcinogens.
Aristolochia
Notice Chemical Listed Effective December 3, 2004 as known to the State of California to Cause Cancer: Riddelliine The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding  riddelliine  to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5, Proposition 65). The listing of  riddelliine  is effective December 3, 2004. Toxicological Endpoint: Cancer

December 3, 2004 -- Proposition 65
Health and Safety Code section 25249.8(a) requires that certain substances identified by the International Agency for Research on Cancer (IARC) or the National Toxicology Program (NTP), as described in Labor Code sections 6382(b)(1) and (d), be included on the Proposition 65 list. 
Riddelline is a current candidate substance under review for the NTP Twelfth Edition Report on Carcinogens. 
National Toxicology Program (NTP, 2003). Toxicology and Carcinogensis Studies of Riddelliine (CAS No. 23246-96-0) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP Technical Report Series No. 508. NIH Publication No. 03-4442.
23246-96-0
Notice Chemical Listed Effective December 7, 2004 as known to the State of California to Cause Reproductive Toxicity: 1-Bromopropane (1-BP) The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding 1-bromopropane (1-BP) to the list of chemicals known to the state to cause reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., Proposition 65). The listing of the chemical is effective December 7, 2004. Toxicological Endpoint: Developmental, female reproductive and male reproductive toxicity

December 7, 2004 -- Proposition 65
NTP Center for the Evaluation of Risks to Human Reproduction (NTP-CERHR 2003). NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of 1-Bromopropane (CAS No. 106-94-5). NIH Publication No. 04-4479 106-94-5
Notice Chemical Listed Effective February 11, 2005 as Known to the State of California to Cause Cancer: Vanadium Pentoxide The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding vanadium pentoxide (orthorhombic crystalline form) to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., Proposition 65). The listing of the chemical is effective February 11, 2005. Toxicological Endpoint: Cancer

February 11, 2005 -- Proposition 65
National Toxicology Program (NTP, 2002). Toxicology and Carcinogensis Studies of Vanadium Pentoxide (CAS No. 1314-62-1) in F344/N Rats and B6C3F1 Mice (Inhalation). NTP Technical Report Series No. 507. NIH Publication No. 03-4441. U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, NTP, Research Triangle Park, NC. 1314-63-1
Notice Chemicals Listed Effective May 20, 2005 as Known to the State of California to Cause Cancer: Cobalt sulfate, Diazoaminobenzene The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding cobalt sulfate (CAS No. 10124-43-3) and diazoaminobenzene (CAS No. 136-35-6) to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5, Proposition 65). The listing of cobalt sulfate and diazoaminobenzene is effective May 20, 2005. Toxicological Endpoint: cancer

May 20, 2005 -- Proposition 65
National Toxicology Program (NTP, 2004). Report on Carcinogens, Eleventh Edition. Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service. National Institute of Environmental Health Sciences, Research Triangle Park, NC. 10124-43-3
Notice Chemicals Listed Effective May 20, 2005 as Known to the State of California to Cause Cancer: Cobalt sulfate, Diazoaminobenzene The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding cobalt sulfate (CAS No. 10124-43-3) and diazoaminobenzene (CAS No. 136-35-6) to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5, Proposition 65). The listing of cobalt sulfate and diazoaminobenzene is effective May 20, 2005. Toxicological Endpoint: cancer

May 20, 2005 -- Proposition 65
NTP concluded that diazoaminobenzene (DAAB) is reasonably anticipated to be a human carcinogen based on evidence from studies in animals and with human tissue demonstrating that DAAB is metabolized to benzene, a known human carcinogen, and on evidence that DAAB causes genetic damage. 
National Toxicology Program (NTP, 2004). Report on Carcinogens, Eleventh Edition. Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service. National Institute of Environmental Health Sciences, Research Triangle Park, NC.
136-35-6
Notice Chemicals Listed Effective May 27, 2005 and May 31, 2005 as known to the State of California to Cause Cancer or Reproductive Toxicity The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding 2-bromopropane (2-BP) (CAS No. 75-26-3)...to the list of chemicals known to the state to cause cancer or reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5, Proposition 65). The listing of... 2-bromopropane (2-BP) is effective May 31, 2005. Toxicological endpoint: Female reproductive and male reproductive toxicity

May 31, 2005 -- Proposition 65
National Toxicology Program - Center for the Evaluation of Risks to Human Reproduction (NTP-CERHR, 2003). NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of 2-Bromopropane . NIH Publication No. 04-4480. U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, NTP, Research Triangle Park, NC. 75-26-3
Notice Chemicals Listed Effective August 19, 2005 as Known to the State of California to Cause Cancer: estrogens, steroidal The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding estrogens, steroidal to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5, Proposition 65). The listing of estrogens, steroidal is effective August 19, 2005.

August 19, 2005 -- Proposition 65
National Toxicology Program (NTP, 2002). Report on Carcinogens, Tenth Edition. Carcinogen Profiles. U.S. Department of Health and Human Services, Public Health Service. National Institute of Environmental Health Sciences, Research Triangle Park, NC. Steroidal Estrogens (as a class)
Notice Chemicals Listed Effective December 2, 2005 as Known to the State of California to Cause Reproductive Toxicity: butyl benzyl phthalate (BBP) (CAS No. 85 68-7), di-n-butyl phthalate (DBP) (CAS No. 84-74-2), and di-n-hexyl phthalate (DnHP) (CAS No. 84-75-3) The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding butyl benzyl phthalate (BBP) (CAS No. 85 68-7), di-n-butyl phthalate (DBP) (CAS No. 84-74-2), and di-n-hexyl phthalate (DnHP) (CAS No. 84-75-3) to the list of chemicals known to the state to cause reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., commonly known as Proposition 65). The listing of the three phthalates is effective December 2, 2005 Toxicological endpoint: cancer. Toxicological endpoints: Developmental toxicity

December 2, 2005 -- Proposition 65
National Toxicology Program. Center for the Evaluation of Risks to Human Reproduction (NTP-CERHR, 2003a). NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Butyl Benzyl Phthalate (BBP). NIH Publication No. 03-4487. 85-68-7
Notice Chemicals Listed Effective December 2, 2005 as Known to the State of California to Cause Reproductive Toxicity: butyl benzyl phthalate (BBP) (CAS No. 85 68-7), di-n-butyl phthalate (DBP) (CAS No. 84-74-2), and di-n-hexyl phthalate (DnHP) (CAS No. 84-75-3) The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding butyl benzyl phthalate (BBP) (CAS No. 85 68-7), di-n-butyl phthalate (DBP) (CAS No. 84-74-2), and di-n-hexyl phthalate (DnHP) (CAS No. 84-75-3) to the list of chemicals known to the state to cause reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., commonly known as Proposition 65). The listing of the three phthalates is effective December 2, 2005 Toxicological endpoint: cancer. Toxicological endpoints: Developmental toxicity, Female reproductive toxicity, and Male reproductive toxicity

December 2, 2005 -- Proposition 65
National Toxicology Program. Center for the Evaluation of Risks to Human Reproduction (NTP-CERHR, 2003b). NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Di-n-Butyl Phthalate (DBP). NIH Publication No. 03-4486. 84-74-2
Notice Chemicals Listed Effective December 2, 2005 as Known to the State of California to Cause Reproductive Toxicity: butyl benzyl phthalate (BBP) (CAS No. 85 68-7), di-n-butyl phthalate (DBP) (CAS No. 84-74-2), and di-n-hexyl phthalate (DnHP) (CAS No. 84-75-3) The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding butyl benzyl phthalate (BBP) (CAS No. 85 68-7), di-n-butyl phthalate (DBP) (CAS No. 84-74-2), and di-n-hexyl phthalate (DnHP) (CAS No. 84-75-3) to the list of chemicals known to the state to cause reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., commonly known as Proposition 65). The listing of the three phthalates is effective December 2, 2005 Toxicological endpoint: cancer. Toxicological endpoints: female reproductive toxicity and male reproductive toxicity

December 2, 2005 -- Proposition 65
National Toxicology Program. Center for the Evaluation of Risks to Human Reproduction (NTP-CERHR, 2003c). NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Di-n-Hexyl Phthalate (DnHP). NIH Publication No. 03-4489. 84-75-3
Notice Announcement of Publication of the Final Technical Support Documents for the Public Health Goal and Responses to Comments for Six Chemicals in Drinking Water In accordance with Health and Safety Code Section 116293 (SB1822, Sher, Statutes of 2002), the Office of Environmental Health Hazard Assessment (OEHHA) hereby publishes the final Public Health Goal (PHG) for cis/trans-1,2-dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, radium-226 and 228, strontium-90, and tritium in drinking water. OEHHA has completed technical support documents that provide the scientific basis for the PHGs.

March 6, 2006 -- Public Health Goals

NTP (2002). Toxicity Studies of trans-1,2-Dichloroethylene (CAS No. 156-60-5) Administered in Microcapsules in Feed to F344/N Rats and B6C3F1 Mice. TOX-55.

156-60-5
Notice Announcement of Publication of the Final Technical Support Documents for the Public Health Goal and Responses to Comments for Six Chemicals in Drinking Water In accordance with Health and Safety Code Section 116293 (SB1822, Sher, Statutes of 2002), the Office of Environmental Health Hazard Assessment (OEHHA) hereby publishes the final Public Health Goal (PHG) for cis/trans-1,2-dichloroethylene, 1,1,1-trichloroethane, 1,1,2-trichloroethane, radium-226 and 228, strontium-90, and tritium in drinking water. OEHHA has completed technical support documents that provide the scientific basis for the PHGs.

March 6, 2006 -- Public Health Goals
NTP (1988). Developmental toxicity evaluation of 1,1,1-trichloroethane (CAS No. 7l-55-6) administered to CD rats. Final report part 2. TO151 and TO179.

NTP (1996). Technical report on renal toxicity studies of selected halogenated ethanes administered by gavage to F344/N rats. Toxicity Report Series. TOX-45

NTP (2000). Technical report on the toxicity studies of 1,1,1-trichloroethane (CAS No. 71-55-6) administered in microcapsules in feed to F344/N rats and B6C3F1 mice. TOX-41
71-55-6
Notice Chemicals Delisted Effective December 8, 2006 from the List of Chemicals Known to the State of California to Cause Cancer, isosafrole, 5-nitro-o-anisidine, tris(aziridinyl)-p-benzoquinone The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is removing isosafrole [CAS No. 120-58-1], 5-nitro-o-anisidine [CAS No. 99-59-2], and tris(aziridinyl)-p-benzoquinone (triaziquone) [CAS No. 68-76-8] from the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The delisting of the three chemicals is effective December 8, 2006. 5-Nitro-o-anisidine was removed from the NTP Sixth Annual Report on Carcinogens as a substance reasonably anticipated to be a human carcinogen in 1991, when NTP concluded there was insufficient evidence of carcinogenicity.

December 8, 2006 -- Proposition 65
Report on Carcinogens, Eleventh Edition (2004); Appendix B; National Toxicology Program, U.S. Department of Health and Human Services, Research Triangle Park, NC 99-59-2
Notice Final Public Health Goal for N-Nitrosodimethylamine and Cadmium in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the publication of the final Public Health Goals (PHGs) for N-nitrosodimethylamine and cadmium.

December 22, 2006 -- Public Health Goals
NTP (2000). 9th Report on Carcinogens. N/A
Notice Chemical Listed Effective April 20, 2007 as Known to the State of California to Cause Reproductive Toxicity: di-isodecyl phthalate (DIDP) The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding di-isodecyl phthalate (DIDP) (CAS No. 68515-49-1 and 26761-40-0) to the list of chemicals known to the state to cause reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., commonly known as Proposition 65). The listing of di-isodecyl phthalate (DIDP) is effective April 20, 2007.

April 20, 2007 -- Proposition 65
National Toxicology Program  Center for the Evaluation of Risks to Human Reproduction (NTP-CERHR, 2003d). NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Di-Isodecyl Phthalate (DIDP). NIH Publication No. 03-4485.
68515-49-1; 26761-40-0
Notice Announcement of Publication of the Final Public Health Goal for Glyphosate in Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the publication of the final Public Health Goals (PHGs) for glyphosate, which is an update of the PHG published in 1997.

June 29, 2007 -- Public Health Goal
NTP (1992). NTP Technical Report on Toxicity Studies of Glyphosate (CAS No. 1071-83-6) Administered In Dosed Feed To F344/N Rats And B6C3F1 Mice. TOX-16. 1071-83-6
Notice Chemical Listed Effective September 28, 2007 as Known to the State of California to Cause Cancer: anthraquinone (CAS No. 84-65-1) The Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is adding anthraquinone (CAS No. 84-65-1) to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., commonly known as Proposition 65). The listing of anthraquinone is effective September 28, 2007. Anthraquinone (CAS No. 84-65-1) is being listed as a chemical known to the State of California to cause cancer. The listing of this chemical is based on formal identification by an authoritative body (i.e., the National Toxicology Program (NTP)), that the chemical causes cancer. The criteria used by OEHHA for the listing of chemicals under the authoritative bodies mechanism can be found in Title 22, Cal. Code of Regs., section 12306. Toxicological endpoint: cancer

September 28, 2007 -- Proposition 65
National Toxicology Program (NTP, 2005). Toxicology and Carcinogenesis Studies of Anthraquinone (CAS No. 84-65-1) in F344/N Rats and B6C3F1 Mice (Feed Studies). NTP Technical Report Series No. 494. NIH Publication No. 05-3953. U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, NTP, Research Triangle Park, NC. Also listed in the 11th Report on Carcinogens (2004) as reasonably anticipated to be a human carcinogen. 84-65-1
Notice Final Public Health Goal for Water Soluble Polychlorinated Biphenyls (PCBs) Expected to be Found in Drinking Water This Public Health Goal (PHG) technical support document provides information on health effects from Water Soluble Polychlorinated Biphenyls Expected to be Found in Drinking Water. PHGs are developed for chemical contaminants based on the best available toxicological data in the scientific literature. These documents and the analyses contained in them provide estimates of the levels of contaminants in drinking water that would pose no significant health risk to individuals consuming the water on a daily basis over a lifetime.

October 5, 2007 -- Public Health Goals
NTP (2000). Ninth Annual Report on Carcinogens. N/A
Notice Final Public Health Goal for Copper in Drinking Water This Public Health Goal (PHG) technical support document provides information on health effects from copper in drinking water. PHGs are developed for chemical contaminants based on the best available toxicological data in the scientific literature. These documents and the analyses contained in them provide estimates of the levels of contaminants in drinking water that would pose no significant health risk to individuals consuming the water on a daily basis over a lifetime.

February 8, 2008 -- Public Health Goals
NTP (1993) Technical Report on Toxicity Studies of Cupric Sulfate (CAS No. 7758-99-8) Administered in Drinking Water and Feed to F344/N Rats and B6C3FX Mice. NIH Publication 93-3352; Research Triangle Park, NC 27709 7758-99-8
Notice Chemical Listed Effective June 17, 2008 as Known to the State of California to Cause Cancer, Dibromoacetic acid (CAS No. 631-64-1) The Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is adding dibromoacetic acid (CAS No. 631-64-1) to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code section 25249.5 et seq., commonly known as Proposition 65). The listing of dibromoacetic acid is effective June 17, 2008. Toxicological endpoints: Reproductive Toxicity and Cancer

June 13, 2008 -- Proposition 65
National Toxicology Program (NTP, 2007). Toxicology and Carcinogenesis Studies of Dibromoacetic Acid (CAS No. 631-64-1) in F344/N Rats and B6C3F1 Mice (Drinking Water Studies). NTP Technical Report Series No. 537. NIH Publication No. 07-4475 631-64-1
Notice Announcement of Publication of The Final Public Health Goals for Lead, Oxamyl and Pentachlorophenol In Drinking Water A revised Public Health Goal (PHG) of 0.3 parts per billion (ppb) is hereby established for pentachlorophenol (PCP) in drinking water, based on carcinogenicity. The earlier PHG for PCP of 0.4 ppb, developed in 1997, is based on the same rodent carcinogenicity data and a cancer potency value identical to that used in this revised PHG.

April 24, 2009 -- Public Health Goals
NTP (1989). Toxicology and carcinogenesis studies of two pentachlorophenol technical-grade mixtures in B6C3F1 mice. NTP TR 349, NIH No. 88-2804.

NTP (1999). Toxicology and carcinogenesis studies of pentachlorophenol in F344/N rats. NTP TR 483, NIH No. 99-3973.

87-86-5
Notice Announcement of Publication of The Final Public Health Goals for Lead, Oxamyl and Pentachlorophenol In Drinking Water The purpose of this document is to review and evaluate the new data since 1997 regarding the toxicity of lead that are relevant to the estimation of a public health-protective level in drinking water, and establish any necessary changes in the previous risk assessment based on the new findings. This document is centered on updating the earlier OEHHA assessments for drinking water (OEHHA, 1997a, 2007).

April 24, 2009 -- Public Health Goals
NTP (2005). Report on carcinogens. 11th edition. N/A
Proposed Announcement of First Public Comment Period and Workshop Draft Technical Support Document on Proposed Public Health Goals for Trihalomethanes in Drinking Water A proposed PHG health risk assessment for each of the four major trihalomethanes (THMs) found in drinking water as a consequence of the chlorination disinfection process, and proposes four individual Public Health Goals (PHGs). The four THMs are chloroform (CHCl3), bromoform (CHBr3), bromodichloromethane (CHBrCl2, or BDCM), and dibromochloromethane (CHBr2Cl, or DBCM). The proposed PHG for chloroform is 0.001 milligram per liter (mg/L) or 1 microgram per liter (μg/L) or 1 part per billion (ppb); for bromoform 5 μg/L; for BDCM 0.4 μg/L; and for DBCM 0.7 μg/L.

June 19, 2009 -- Public Health Goals
NTP (1985). Toxicology and carcinogenesis studies of chlorodibromomethane (CAS No. 124-48-1) in F344/N rats and B6C3F1 mice (gavage studies). NTP Technical Report Series No. 282.

NTP (1987). Toxicology and carcinogenesis studies of bromodichloromethane (CAS No. 75-27-4) in F344/N rats and B6C3F1 mice (gavage studies). NTP Technical Report Series No. 321.

NTP (1988). Chloroform reproduction and fertility assessment in CD-1 mice when administered by gavage. Report by Environmental Health Research and Testing, Inc., Lexington, Kentucky, to National Toxicology Program, NTP-89-018. NTIS PB89-148639.

NTP (1989a). Toxicology and carcinogenesis studies of tribromomethane (bromoform) (CAS No. 75-25-2) in F344/N rats and B6C3F1 mice (gavage studies). NTP Technical Report Series No. 350.

NTP (1989b). Bromoform: reproduction and fertility assessment in Swiss CD-1 mice when administered by gavage. Report no. NTP-89-068.

NTP (1994). Comparative toxicology studies of corn oil, safflower oil, and tricaprylin (CAS Nos. 8001-30-7, 8001-23-8, and 538-23-8) in male F344/N rats as vehicles for gavage. NTP Technical Report Series No. 426.

NTP (1996). Final report on the short term reproductive and developmental toxicity of chlorodibromomethane (CAS No. 124-48-1) administered in drinking water to Sprague-Dawley rats. Report by R.O.W. Sciences, Inc., Gaithersburg, MD. Pub No. NTIS/PB97-111728.

NTP (1998). Final Report on the short-term reproductive and developmental toxicity of bromodichloromethane (CAS No. 75-27-4) administered in drinking water to Sprague-Dawley rats. Pub no. NTIS/PB99-111262.

NTP (2004). Bromodichloromethane and Chloroform. In: 11th Report on Carcinogens.

67-66-33
75-25-2
75-27-4
124-48-1
Notice Announcement of Publication of the Final Public Health Goal for Trichloroethylene in Drinking Water OEHHA within the California Environmental Protection Agency is announcing the availability of the final technical support document for the Public Health Goal (PHG) for the solvent trichloroethylene in drinking water. This document increases the PHG for trichloroethylene to 1.7 parts per billion, versus 0.8 ppb in the original PHG published in 1999. The PHG is based on the same cancer endpoint with an updated potency calculation.

July 9, 2009 -- Public Health Goals
NTP (1983). Technical report on the carcinogenesis studies of trichloroethylene (without epichlorohydrin) (CAS No.79-01-6) in F344/N rats and B6C3Fl mice (gavage studies): Draft report. Publ. No. 83-1799. 

NTP (1988). Toxicology and carcinogenesis studies of trichloroethylene (CAS No. 79-01-6) in four strains of rats (ACI, August, Marshall, Osborne-Mendel) (gavage studies). Tech Report Series No.273. NIH Publ. No. 88-2525. 

NTP (1990). Carcinogenesis studies of trichloroethylene (without epichlorohydrin) (CAS No. 79-01-6) in F344/N rats and B6C3F1 mice (gavage studies). Tech Report Series No. 243.  

NTP (1997). Time course autoimmunity study of trichloroethylene (CAS No. 79-01-6) in female brown Norway rats. Tech Rep Series No. IMM96007.
79-01-6
Proposed Announcement of First Public Comment Period and Workshop for the Draft Technical Support Document on Proposed Public Health Goal for Antimony in Drinking Water Public Health Goal (PHG) of 0.0007 mg/L or 0.7 parts per billion (ppb) is proposed for antimony in drinking water, based on data from use of antimonials in medical practice. In 1997, the Office of Environmental Health Hazard Assessment (OEHHA) developed a PHG for antimony of 20 ppb in drinking water, based on extrapolation from effect levels in rats.

July 23, 2009 -- Public Health Goals
NTP (1992). Technical report on the toxicity studies of antimony potassium tartrate in F344/N rats and B6C3F1 mice (drinking water and intraperitoneal injection studies). NTP Tox 11. 1309-64-4
Notice Announcement of Publication of The Final Public Health Goal For 1,2,3-Trichloropropane In Drinking Water Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is announcing the availability of the final technical support document for the Public Health Goal (PHG) for the solvent 1,2,3-trichloropropane in drinking water. This document establishes a PHG for 1,2,3-trichloropropane of 0.0007 parts per billion, versus the current Notification Level of 0.005 ppb, set in 2005. The PHG is based on an updated cancer potency calculation.

August 20, 2009 -- Public Health Goals
NTP (1982). Carcinogenesis bioassay of 1,2-dibromo-3-chloropropane (CAS No. 96-12-8) in F344/N rats and B6C3F1 mice (inhalation studies). Technical Report Series No 206. NIH publication No. 82-1762. 

NTP (1993). Toxicology and carcinogenesis of 1,2,3-trichloropropane (CAS No. 96-18-4) in F344/N Rats and B6C3F1 Mice (gavage studies). Technical Report Series No 384. NIH publication No. 94-2839. 

NTP (2004). 1,2,3-Trichloropropane, Report on Carcinogens, Eleventh Edition
96-18-4
Proposed OEHHA Releases Draft (Pubic Health Goal) PHG for Hexavalent Chromium, announces workshop and opens comment period Draft public health goal for hexavalent chromium in drinking water. This draft document is a new risk assessment, culminating an extensive evaluation of oral toxicity of this chemical. A PHG of 0.06 ug/L or 0.06 parts per billion (ppb) is proposed for hexavalent chromium in drinking water, based on tumor incidence data from rodent cancer bioassays.

August 20, 2009 -- Public Health Goals
NTP (2008). NTP Technical Report on the Toxicology and Carcinogenesis Studies of Sodium Dichromate Dihydrate in F344/N Rats and B6C3F1 Mice. NTP TR 546. National Toxicology Program. 7789-12-0
Final Rule Bromochloroacetic acid (CAS No. 5589-96-8), Cumene (CAS No. 98-82-8) and Diclofop-methyl (CAS No. 51338-27-3) Listed as known to the state to cause Cancer The Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is adding Bromochloroacetic acid (CAS No. 5589-96-8), Cumene (CAS No. 98-82-8) and Diclofop-methyl (CAS No. 51338-27-3) to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 ). The listing of bromochloroacetic acid, cumene and diclofop-methyl is effective April 6, 2010.

April 2, 2010 -- Proposition 65
National Toxicology Program (NTP, 2009). Toxicology and Carcinogenesis Studies of Cumene (CAS No. 98-82-8) in F344/N Rats and B6C3F1 Mice (Inhalation Studies). NTP Technical Report Series No. 542.

National Toxicology Program (NTP, 2009). Toxicology and Carcinogenesis Studies of Bromochloroacetic Acid (CAS No. 5589-96-8) in F344/N Rats and B6C3F1 Mice (Drinking Water Studies). NTP Technical Report Series No. 549.

5589-96-8; 98-82-8
Notice Announcement of Publication of the Final Public Health Goals for Benzo(A)Pyrene, Methoxychlor, and TCDD (Dioxin) In Drinking Water The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency announces the publication of the final technical support documents for the Public Health Goals (PHGs) for benzo(a)pyrene, methoxychlor, and TCDD (dioxin) in drinking water. The PHG for benzo(a)pyrene is established at 0.007 parts per billion (ppb), based on carcinogenic effects in rats and mice. The PHG for methoxychlor is established at 0.09 ppb, based on effects in male offspring of female mice treated with methoxychlor during pregnancy. The PHG for TCDD is established at 0.00005 parts per trillion (ppt), based on tumors in multiple sites in female rats.

September 16, 2010 -- Public Health Goals
NTP (1982a). Bioassay of 2,3,7,8-tetrachlorodibenzo-p-dioxin for possible carcinogenicity (gavage study). TR 201. National Toxicology Program, U.S. DHHS, Public Health Service, Research Triangle Park, NC.

NTP (1982b). Carcinogenesis bioassay of 2,3,7,8-tetrachlorodibenzo-p-dioxin (CAS no. 1746-01-6) in Osborne-Mendel rat and B6C3F1 mice (gavage study). TR 109. National Toxicology Program, DHHS, Public Health Service, Research Triangle Park, NC.

NTP (1984). Report of the NTP ad hoc panel on chemical carcinogenesis testing and evaluation. Board of Scientific Counselors. National Toxicology Program, U.S. DHHS, Public Health Service, Research Triangle Park, NC.

NTP (2001). Report on Carcinogens, Ninth Edition. National Toxicology Program, U.S. DHHS, Public Health Service, Research Triangle Park, NC.

NTP (2004). Toxicology and carcinogenesis studies of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in female Harlan Sprague-Dawley rats (gavage study). TR 521. NIH publication No. 04-4455. National Toxicology Program, Public Health Service, National Institutes of Health, Research Triangle Park, NC.

NTP/NIEHS (1989). Symposium on Significance of Foci of Cellular Alteration in the Rat Liver. Toxicol Pathol 17:557-735.
N/A
Notice Chemical listed effective January 7, 2011 as known to the state of California to cause cancer: 4-methylimidazole 4-Methylimidazole meets the criteria for listing as known to the State to cause cancer under the Safe Drinking Water and Toxic Enforcement Act of 1986 (Health and Safety Code Section 25249.5 et seq.), more commonly known as Proposition 65, via the authoritative bodies mechanism. The regulatory requirements for listing by this mechanism are set forth in Title

January 7, 2011 -- Proposition 65
National Toxicology Program (NTP, 2007). Toxicology and Carcinogenesis Studies of 4-Methylimidazole (CAS No. 822-36-6) in F344/N Rats and B6C3F1 Mice (Feed Studies). NTP Technical Report Series No. 535. NIH Publication No. 07-4471. U.S. Department of Health and Human Services, NTP, Research Triangle Park, NC. 822-36-6
Notice Chemical Listed Effective February 25, 2011 as Known to the State of California to Cause Reproductive Toxicity: Acrylamide (CAS No. 79-06-1) The Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is adding acrylamide (CAS No. 79-06-1) to the list of chemicals known to the state to cause reproductive toxicity for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65). The listing of acrylamide is effective February 25, 2011. Acrylamide is being listed as a chemical known to the State of California to cause developmental and male reproductive toxicity.

February 25, 2011 -- Proposition 65
NTP-CERHR. NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Acrylamide. NIH Publication No. 05-4472. (2005) 79-06-1
Notice Chemicals listed effective May 3, 2011 as known to the state of California to cause cancer: Malonaldehyde, Sodium Salt The Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is adding four chemicals -- androstenedione (CAS No. 63-05-8), dibromoacetonitrile (CAS No. 3252-43-5), hexachlorobutadiene (CAS No. 87-68-3), and malonaldehyde, sodium salt (CAS No. 24382-04-5) -- to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 ). The listing of the four chemicals is effective May 3, 2011.

May 3, 2011 -- Proposition 65
National Toxicology Program (NTP, 1988). Toxicology and Carcinogenesis Studies of Malonaldehyde, Sodium Salt (3-Hydroxy-2-propenal, Sodium Salt) (CAS No. 24382-04-5) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP Technical Report Series No. 331. NIH Publication No. 89-2587, U.S. Department of Health and Human Services, NTP Research Triangle Park, NC. 24382-04-5
Notice Chemicals listed effective May 3, 2011 as known to the state of California to cause cancer: Dibromoacetonitrile The Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is adding four chemicals -- androstenedione (CAS No. 63-05-8), dibromoacetonitrile (CAS No. 3252-43-5), hexachlorobutadiene (CAS No. 87-68-3), and malonaldehyde, sodium salt (CAS No. 24382-04-5) -- to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 ). The listing of the four chemicals is effective May 3, 2011.

May 3, 2011 -- Proposition 65
National Toxicology Program (NTP, 2010). Toxicology and Carcinogenesis Studies of Dibromoacetonitrile (CAS No. 3252-43-5) in F344/N Rats and B6C3F1 Mice (Drinking Water Studies). NTP Technical Report Series No. 544. NIH Publication No. 10-5886. U.S. Department of Health and Human Services, NTP, Research Triangle Park, NC. 3252-43-5
Notice Chemicals listed effective May 3, 2011 as known to the state of California to cause cancer: androstenedione The Office of Environmental Health Hazard Assessment (OEHHA) within the California Environmental Protection Agency is adding four chemicals -- androstenedione (CAS No. 63-05-8), dibromoacetonitrile (CAS No. 3252-43-5), hexachlorobutadiene (CAS No. 87-68-3), and malonaldehyde, sodium salt (CAS No. 24382-04-5) -- to the list of chemicals known to the state to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65 ). The listing of the four chemicals is effective May 3, 2011.

May 3, 2011 -- Proposition 65
National Toxicology Program (NTP, 2010). Toxicology and Carcinogenesis Studies of Androstenedione (CAS No. 63-05-8) in F344/N Rats and B6C3F1 Mice (Gavage Studies). NTP Technical Report Series No. 560. NIH Publication No. 10-5901. U.S. Department of Health and Human Services, NTP, Research Triangle Park, NC. 63-05-8
Notice Added to list of chemicals known to the State to cause cancer: Isopyrazam and 3,3',4,4'-Tetrachloroazobenzene Effective July 24, 2012, the Office of Environmental Health Hazard Assessment (OEHHA) is adding two chemicals, isopyrazam (CAS No. 881685-58-1) and 3,3’,4,4’‑tetrachloroazobenzene (CAS No. 14047-09-7), to the list of chemicals known to the State to cause cancer for purposes of the Safe Drinking Water and Toxic Enforcement Act of 1986 (commonly known as Proposition 651)

July 24, 2012 -- Proposition 65
NTP (2010). National Toxicology Program. Toxicology and Carcinogenesis Studies of 3,3',4,4'-Tetrachloroazobenzene (TCAB) (CAS No. 14047-09-7) in Harlan Sprague-Dawley Rats and B6C3F1 Mice (Gavage Studies).  Technical Report Series No. 558. NIH Publication No. 11-5899. U.S. Department of Health and Human Services, NTP, Research Triangle Park, NC. 14047-09-7
Notice Chemical Delisted Effective April 19, 2013 As Known To The State Of California To Cause Reproductive Toxicity: Bisphenol A (BPA) Effective April 19, 2013, the Office of Environmental Health Hazard Assessment (OEHHA) is removing bisphenol A (BPA) (CAS No. 80-05-7) from the list of chemicals known to the State to cause cancer or reproductive toxicity for purposes of Proposition 65.1 The chemical was added to the list on April 11, 2013 based on reproductive endpoints (developmental toxicity).

April 19, 2013 -- Proposition 65
NTP-CERHR (2008). NTP-CERHR Monograph on the Potential Human Reproductive And Developmental Effects of Bisphenol A. Research Triangle Park, NC, National Toxicology Program: NIH Publication No. 08 – 5994.

NTP (1985) Bisphenol A: reproduction and fertility assessment in CD-1 mice when administered in the feed. NTP-85-192. Re­search Triangle Park, NC.

80-05-7
Notice Notice of intent to list: N,N-dimethyl-p-toluidine The California Environmental Protection Agency's Office of Environmental Health Hazard Assessment (OEHHA) intends to list N,N-dimethyl-p-toluidine as known to the State to cause cancer under the Safe Drinking Water and Toxic Enforcement Act of 1986. This action is being proposed under the authoritative bodies listing mechanism.

March 14, 2014 -- Proposition 65
NTP (2012). National Toxicology Program. Toxicology and Carcinogenesis Studies of N,N-Dimethyl-p-Toluidine (CAS No. 99-97-8) in F344/N Rats and B6C3F1/N Mice (Gavage Studies). Technical Report Series No. 579. NIH Publication No. 12-5921. U.S. Department of Health and Human Services, NTP, Research Triangle Park, NC. 99-97-8
Notice Intent To List: Ethylene Glycol The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) intends to list the chemical ethylene glycol (EG) as known to the state to cause reproductive toxicity (developmental endpoint) under the Safe Drinking Water and Toxic Enforcement Act of 1986.1 This action is being proposed under the authoritative bodies listing mechanism.

April 11, 2014 -- Proposition 65
NTP-CERHR (2004). NTP-CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Ethylene Glycol. Research Triangle Park, NC, National Toxicology Program, Center for the Evaluation of Risks to Human Reproduction: NIH Publication No. 04 – 4481. 107–21–1
Total Notices 73


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Centers for Disease Control and Prevention
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Notice World Trade Center Health Program; Addition of Certain Types of Cancer to the List of WTC-Related Health Conditions Title I of the James Zadroga 9/11 Health and Compensation Act of 2010 amended the Public Health Service Act (PHS Act) to establish the World Trade Center (WTC) Health Program. The WTC Health Program, which is administered by the Director of the National Institute for Occupational Safety and Health (NIOSH), within the Centers for Disease Control and Prevention (CDC), provides medical monitoring and treatment to eligible firefighters and related personnel, law enforcement officers, and rescue, recovery, and cleanup workers who responded to the September 11, 2001, terrorist attacks in New York City, at the Pentagon, and in Shanksville, Pennsylvania, and to eligible survivors of the New York City attacks. In accordance with our regulations, which establish procedures for adding a new condition to the list of health conditions covered by the WTC Health Program, this proposed rule would add certain types of cancer to the List of WTC-Related Health Conditions.

June 13, 2012 -- 77 FR 35574
NTP’s Report on Carcinogens states arsenic and vinyl chloride as known carcinogens (ROC). 7740-38-2
75-01-4
Final Rule World Trade Center Health Program; Addition of Certain Types of Cancer to the List of WTC-Related Health Conditions Title I of the James Zadroga 9/11 Health and Compensation Act of 2010 amended the Public Health Service Act (PHS Act) to establish the World Trade Center (WTC) Health Program. The WTC Health Program, which is administered by the Director of the National Institute for Occupational Safety and Health (NIOSH), within the Centers for Disease Control and Prevention (CDC), provides medical monitoring and treatment to eligible firefighters and related personnel, law enforcement officers, and rescue, recovery, and cleanup workers who responded to the September 11, 2001, terrorist attacks in New York City, at the Pentagon, and in Shanksville, Pennsylvania, and to eligible survivors of the New York City attacks. In accordance with WTC Health Program regulations, which establish procedures for adding a new condition to the list of covered health conditions, this final rule adds to the List of WTC-Related Health Conditions the types of cancer proposed for inclusion by the notice of proposed rulemaking.

September 12, 2012 -- 77 FR 567138
Five main sources, including the National Toxicology Program, were used to evaluate whether to add cancers to the WTC-Related Health Conditions list. One of several methods used to identify cancers employed the list of known human carcinogens and those agents reasonably anticipated to be carcinogenic in humans (ROC). NA
Final Rule World Trade Center Health Program; Certification of Breast Cancer in WTC Responders and Survivors Exposed to PCBs On September 12, 2012, HHS published a final rule in the Federal Register adding certain types of cancer to the List of World Trade Center (WTC)-Related Health Conditions (List) established in the WTC Health Program regulation. Breast cancer was included on the List, although only individuals experiencing nighttime sleep disruption as a result of response and cleanup activities involving shiftwork are currently considered to have experienced exposure relevant for certification. A recent publication in The Lancet Oncology by the International Agency for Research on Cancer (IARC) concludes that there is limited evidence that polychlorinated biphenyls (PCBs) cause breast cancer in humans. As described below, the WTC Program Administrator (Administrator) has found that PCBs were present in WTC dust in the New York City disaster area and, accordingly, the Program will now certify breast cancer in eligible WTC responders and survivors who were exposed to either shiftwork/nighttime sleep disruption or PCBs as a result of the 9/11 attacks.

April 17, 2013 -- 78 FR 22794
National Toxicology Program Report on Carcinogens (ROC):  Polychlorinated biphenyls are reasonably anticipated to be a human carcinogen. 1336-36-3
Proposed World Trade Center Health Program; Addition of Prostate Cancer to the List of WTC-Related Health Conditions On May 2, 2013, the Administrator of the World Trade Center (WTC) Health Program received a petition (Petition 002) requesting the addition of prostate cancer to the List of WTC-Related Health Conditions (List) covered in the WTC Health Program. The Administrator has determined to publish a proposed rule adding malignant neoplasm of the prostate (prostate cancer) to the List in the WTC Health Program regulations.

July 2, 2013 -- 78 FR 39670
  National Toxicology Program Report on Carcinogens (ROC):  arsenic and cadmium are known to be a human carcinogen. 7440-38-2
7440-43-9
Final Rule World Trade Center Health Program; Addition of Prostate Cancer to the List of WTC-Related Health Conditions. On May 2, 2013, the Administrator of the World Trade Center (WTC) Health Program received a petition (Petition 002) requesting the addition of prostate cancer to the List of WTC-Related Health Conditions (List) covered in the WTC Health Program. In this final rule, the Administrator adds malignant neoplasm of the prostate (prostate cancer) to the List in the WTC Health Program regulations.

September 19, 2013 -- 78 FR 57505
National Toxicology Program Report on Carcinogens (ROC).  Various methods of evaluation were established to determine if cancers or types of cancer are added to the World Trade Center-related health conditions.  One method is to evaluate findings of the 9/11 exposure with the National Toxicology Program’s categorization as a known or reasonably anticipated human carcinogen. NA
Total Notices 5


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Consumer Product Safety Commission
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Proposed Rule Urea Formaldehyde Foam Insulation CPSC proposed rule to ban manufacture or sale in the US.

February 5, 1981 -- 46 FR 11188
NIEHS participation on Task Force to verify findings concerning carcinogenicity of urea formaldehyde. 50-00-0
Final Rule Urea Formaldehyde Foam Insulation CPSC final rule banning UF foam insulation in residences and schools.

April 2, 1982 -- 47 FR 14366
Statement by the Director of NIEHS that Formaldehyde is an animal carcinogen is cited in support of the ban. 50-00-0
Final Rule Dioxin-containing Wastes Issued guidelines specifying criteria for determining when any customary or reasonably foreseeable use of an art material can result in chronic hazard.

October 9, 1992 -- 57 FR 46624
NTP criteria for assessing the quality and adequacy of animal studies. N/A
Proposed Standard for the Flammability (Open Flame) of Mattresses and Mattress/Foundation Sets; Notice of Proposed Rulemaking The Commission is proposing a flammability standard under the authority of the Flammable Fabrics Act that would address open flame ignition of mattresses and mattress and foundation sets ("mattresses/sets").

January 13, 2005 -- 70 FR 2470
Additional activities by EPA, The National Toxicology Program (NTP) of the Department of Health and Human Services (DHHS), and the Occupational Safety and Health Administration (OSHA) can provide information about any adverse health effects of FR chemicals and take actions to limit their use if necessary. N/A
Notice Standard for the Flammability of Residential Upholstered Furniture The United States Consumer Product Safety Commission (Commission or CPSC) is proposing flammability standards for residential upholstered furniture under the Flammable Fabrics Act (FFA). The proposal would establish performance requirements and certification and labeling requirements for upholstered furniture. Manufacturers of upholstered furniture would choose one of two possible methods of compliance: They could use cover materials that are sufficiently smolder resistant to meet a cigarette ignition performance test; or they could place fire barriers that meet smoldering and open flame resistance tests between the cover fabric and interior filling materials. Manufacturers of upholstered furniture would be required to certify compliance with the standard and to comply with certain recordkeeping requirements as specified in the proposal.

March 4, 2008 -- 73 FR 11702
At the request of the staff, the National Toxicology Program (NTP) of the Department of Health and Human Services has undertaken a review of several FRs that could be used to meet CPSC flammability rules. The NTP review will be a relatively long-term project that contributes to the overall level of knowledge about FR chemicals among scientists and regulators. NA
Proposed Proposed Statement of Policy on Animal Testing The Consumer Product Safety Commission (CPSC or Commission) proposes to codify its statement of policy on animal testing, as amended, which was previously published in the Federal Register. The amended statement of policy on animal testing is intended for manufacturers of products subject to the Federal Hazardous Substances Act (FHSA) to find alternatives to animal testing and reduce the number of animal tests under the FHSA.

June 29, 2012 -- 77 FR 38751
According to the ICCVAM Authorization Act, ICCVAM member agencies should promote and encourage the development and use of alternatives to animal test methods for regulatory purposes. Since the establishment of ICCVAM, the CPSC has approved, where applicable, recommendations made by ICCVAM to reduce and refine animal testing applicable to test methods under the FHSA. The CPSC is amending and updating regulations under the FHSA to make the ICCVAM recommendations and the CPSC animal testing policy more accessible and transparent to interested parties. CPSC will also create a page on its website regarding ICCVAM recommendations and new developments in test methods that further reduce or refine animal testing. (ICCVAM) NA
Total Notices 6


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Department of Defense
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Final Rule Defense Federal Acquisition Regulation Supplement; Minimizing the Use of Materials Containing Hexavalent Chromium (DFARS Case 2009–D004) DoD is issuing a final rule amending the Defense Federal Acquisition Regulation Supplement (DFARS) to implement the requirements for minimizing the use of materials containing hexavalent chromium in items acquired by DoD (deliverables and construction materials hereafter referred to as deliverables). Hexavalent chromium is a chemical that has been used in numerous DoD weapons systems and platforms due to its corrosion protection properties. However, hexavalent chromium is a known carcinogen. This rule codifies a DoD policy for addressing the serious human health and environmental risks related to the use of hexavalent chromium. The rule prohibits the delivery of items containing more than 0.1 percent by weight hexavalent chromium in any homogeneous material under DoD contracts unless there is no acceptable alternative to the use of hexavalent chromium.

May 5, 2011 -- 76 FR 25569
The National Toxicology Program’s Report on Carcinogens lists hexavalent chromium compounds as known human carcinogens. (ROC) N/A
Total Notices 1


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Department of Transportation
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Proposed Proposed Rulemaking To Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards EPA and NHTSA are issuing this joint proposal to establish a National Program consisting of new standards for light-duty vehicles that will reduce greenhouse gas emissions and improve fuel economy. This joint proposed rulemaking is consistent with the National Fuel Efficiency Policy announced by President Obama on May 19, 2009, responding to the country’s critical need to address global climate change and to reduce oil consumption. EPA is proposing greenhouse gas emissions standards under the Clean Air Act, and NHTSA is proposing Corporate Average Fuel Economy standards under the Energy Policy and Conservation Act, as amended. These standards apply to passenger cars, light-duty trucks, and medium-duty passenger vehicles, covering model years 2012 through 2016, and represent a harmonized and consistent National Program. Under the National Program, automobile manufacturers would be able to build a single light-duty national fleet that satisfies all requirements under both programs while ensuring that consumers still have a full range of vehicle choices.

September 28, 2009 -- 74 FR 49553
The National Toxicology Program in its Report on Carcinogens has characterized many components of automobile and truck engines to be known or potential carcinogens. They are benzene, 1, 3-butadiene, acetaldehyde, and naphthalene.  (ROC) 71-43-2
106-99-0
75-07-0
91-20-3
Final Rule Hazardous Materials: Revision to the List of Hazardous Substances and Reportable Quantities PHMSA amends the Hazardous Materials Regulations by removing saccharin and its salts from the list of hazardous substances and reportable quantities. The Comprehensive Environmental Response, Compensation and Liability Act, requires PHMSA to list and regulate all hazardous substances designated by statute or by the U.S. Environmental Protection Agency (EPA). EPA recently removed saccharin and its salts from their list of hazardous substances through notice and comment rulemaking. This final rule simply harmonizes the lists to better enable shippers and carriers to identify the affected hazardous substances, comply with all applicable regulatory requirements, and make required notifications if the release of a hazardous substance occurs.

June 27, 2011 -- 76 FR 37283
Saccharin and its salts do not pose a present or potential risk of causing carcinogenic effects on humans. (ROC, Appendix B) 81-07-2
Final Rule Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles EPA and NHTSA, on behalf of the Department of Transportation, are each finalizing rules to establish a comprehensive Heavy-Duty National Program that will reduce greenhouse gas emissions and fuel consumption for on-road heavy-duty vehicles, responding to the President's directive on May 21, 2010, to take coordinated steps to produce a new generation of clean vehicles. NHTSA's final fuel consumption standards and EPA's final carbon dioxide (CO2) emissions standards are tailored to each of three regulatory categories of heavy-duty vehicles: Combination Tractors; Heavy-duty Pickup Trucks and Vans; and Vocational Vehicles. The rules include separate standards for the engines that power combination tractors and vocational vehicles. Certain rules are exclusive to the EPA program. These include EPA's final hydrofluorocarbon standards to control leakage from air conditioning systems in combination tractors, and pickup trucks and vans. These also include EPA's final nitrous oxide (N2O) and methane (CH4) emissions standards that apply to all heavy-duty engines, pickup trucks and vans. EPA's final greenhouse gas emission standards under the Clean Air Act will begin with model year 2014. NHTSA's final fuel consumption standards under the Energy Independence and Security Act of 2007 will be voluntary in model years 2014 and 2015, becoming mandatory with model year 2016 for most regulatory categories. Commercial trailers are not regulated in this phase of the Heavy-Duty National Program. The agencies estimate that the combined standards will reduce CO2 emissions by approximately 270 million metric tons and save 530 million barrels of oil over the life of vehicles sold during the 2014 through 2018 model years, providing over $7 billion in net societal benefits, and $49 billion in net societal benefits when private fuel savings are considered. EPA is also finalizing provisions allowing light-duty vehicle manufacturers to use CO2 credits to meet the light-duty vehicle N2O and CH4 standards, technical amendments to the fuel economy provisions for light-duty vehicles, and a technical amendment to the criteria pollutant emissions requirements for certain switch locomotives.

September 15, 2011 -- 76 FR 57106
In the National Toxicology Program’s Report on Carcinogens (ROC), the following compounds have been listed as: a) known carcinogens to humans: Benzene, 1,3-Butadiene; b) possibly carcinogenic to humans: acetaldehyde; or c) reasonably anticipated to be a human carcinogen: naphthalene. 71-43-2
106-99-0
75-07-0
91-20-3
Proposed 2017 and Later Model Year Light-Duty Vehicle Greenhouse Gas Emissions and Corporate Average Fuel Economy Standards EPA and NHTSA, on behalf of the Department of Transportation, are issuing this joint proposal to further reduce greenhouse gas emissions and improve fuel economy for light-duty vehicles for model years 2017-2025. This proposal extends the National Program beyond the greenhouse gas and corporate average fuel economy standards set for model years 2012-2016. On May 21, 2010, President Obama issued a Presidential Memorandum requesting that NHTSA and EPA develop through notice and comment rulemaking a coordinated National Program to reduce greenhouse gas emissions of light-duty vehicles for model years 2017-2025. This proposal, consistent with the President's request, responds to the country's critical need to address global climate change and to reduce oil consumption. NHTSA is proposing Corporate Average Fuel Economy standards under the Energy Policy and Conservation Act, as amended by the Energy Independence and Security Act, and EPA is proposing greenhouse gas emissions standards under the Clean Air Act. These standards apply to passenger cars, light-duty trucks, and medium-duty passenger vehicles, and represent a continued harmonized and consistent National Program. Under the National Program for model years 2017-2025, automobile manufacturers would be able to continue building a single light-duty national fleet that satisfies all requirements under both programs while ensuring that consumers still have a full range of vehicle choices. EPA is also proposing a minor change to the regulations applicable to MY 2012-2016, with respect to air conditioner performance and measurement of nitrous oxides.

December 1, 2011 -- 76 FR 74854
Components of greenhouse gas emissions of light-duty vehicles (benzene, 1,3-butadiene, acetaldehyde, and naphthalene) were cited in the National Toxicology Program’s Report on Carcinogens (ROC). The following compounds have been listed as: a) known carcinogens to humans: Benzene, 1,3-Butadiene; b) possibly carcinogenic to humans; acetaldehyde; or c) reasonably anticipated to be a human carcinogen: naphthalene. 71-43-2
106-99-0
75-07-0
91-20-3
Total Notices 4


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Department of Treasury
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Final Rule Removal of Requirement to Disclose Saccharin in the Labeling of Wine, Distilled Spirits, and Malt Beverages The Department of the Treasury is removing the requirement for bottlers of wine, distilled spirits, and malt beverages to show a warning on products containing saccharin.

June 16, 2004 -- 69 FR 33573
Since 1981, saccharin had been listed in the Report on Carcinogens as reasonably anticipated to be a human carcinogen. However, it was delisted in the 9th Report on Carcinogens. The NTP determined that the rodent cancer data is insufficient to meet the current criteria to list the chemical as reasonably anticipated to be a human carcinogen. This is based on the perception that the observed bladder tumors in rats arise by mechanisms not relevant to humans and the lack of data in humans suggesting a carcinogenic hazard. 81-07-2
Final Rule Removal of Requirement To Disclose Saccharin in the Labeling of Wine, Distilled Spirits, and Malt Beverages Amends the Alcohol and Tobacco Tax and Trade Bureau's labeling regulations to remove the requirement for bottlers of wine, distilled spirits, and malt beverages to show a warning on products containing saccharin. The regulatory amendments in this document reflect the National Toxicology Program's revised findings about saccharin and the removal of the statutory requirement for the warning.

June 16, 2004 -- 69 FR 33572
On May 15, 2000, the U.S. Department of Health and Human Services, Public Health Service, National Toxicology Program published the 9th Report on Carcinogens. The report delisted saccharin, which had been listed in the Report as "reasonably anticipated to be a human carcinogen" since 1981. The Report explained that saccharin was removed from the list after a review of the carcinogenicity data for saccharin concluded that rodent cancer data are not sufficient to meet the current criteria to list this chemical as reasonably anticipated to be a human carcinogen based on the perception that the observed bladder tumors in rats arise by mechanisms not relevant to humans, and the lack of data in humans suggesting a carcinogenic hazard. 81-07-2
Total Notices 2


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Drug Enforcement Administration
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Final Rule Schedules of Controlled Substances: Placement of Carisoprodol Into Schedule IV With the issuance of this final rule, the Administrator of the Drug Enforcement Administration (DEA) places the substance carisoprodol, including its salts, isomers, and salts of isomers, whenever the existence of such salts, isomers, and salts of isomers is possible, into Schedule IV of the Controlled Substances Act (CSA). This action is pursuant to the CSA which requires that such actions be made on the record after opportunity for a hearing.

December 12, 2011 -- 76 FR 77330
DEA used NTP’s Toxicity studies of carisoprodol in rats and mice to support its placement of carisoprodol into Schedule IV of the Controlled Substances Act. 78-44-4
Total Notices 1


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Environmental Protection Agency
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Proposed Rule Chloromethane and Chlorinated Benzenes EPA proposed rule to require testing under TSCA Section 4.

July 18, 1980 -- 45 FR 48524
NTP has selected 1,4-Dichlorobenzene for teratogenicity testing. 106-46-7
Other Asbestos EPA proposed rule to require schools to identify friable asbestos-containing materials and to notify employees and PTAs.

September 17, 1980 -- 45 FR 61966
NIEHS-sponsored studies of effects of asbestos exposure. 1332-21-4
Other Alkyl Phthalate and Benzyl Butyle Phthalate EPA notice of preliminary decision not to require testing under TSCA, following receipt of CMA testing proposal.

October 30, 1981 -- 46 FR 53775
NTP conducting mutagenicity, oncogenicity, and reproductive and mitochondrial effects studies of various alkyl phthalate esters. 85-68-7
Notice Benzidine, o-Tolidine, o-Dianisidine EPA notice that testing under TSCA Section 4 is not required due to adequacy of current testing programs of NTP and other federal agencies.

November 5, 1981 -- 46 FR 55004
Current and planned testing by NTP cited. 92-87-5
119-93-7
Notice Chlorinated Paraffins EPA notice that testing under TSCA Section 4 is not being required because currently planned testing is sufficient.

January 8, 1982 -- 47 FR 1017
NTP bioassays of two chlorinated paraffin compounds. (TR-305) (TR-308) 108171-27-3
108171-26-2
Final Rule Asbestos EPA final rule requiring schools to identify friable asbestos-containing building materials, to maintain records, and to notify employees and PTA's.

May 27, 1982 -- 47 FR 23360
Reference to report on Amosite, Chrysotile, Crocidolite and nonfibrous Tremolite for NIEHS oral ingestion studies. 12001-28-4
12001-29-5
14567-73-8
1332-21-4
12172-73-5
Notice Xylenes EPA notice that testing under TSCA Section 4 is not warranted.

December 16, 1982 -- 47 FR 56392
NTP cancer bioassay and teratogenicity study of mixed Xylenes. 1330-20-7
Notice Toluene EPA notice that a test rule under TSCA Section 4 is unnecessary because information from current and planned testing will be sufficient.

December 16, 1982 -- 47 FR 56391
NTP has completed a subchronic oral study and NTP/NCI carcinogenesis testing program is starting chronic studies. 108-88-3
Notice Acetonitrile EPA notice that testing by NTP and manufacturers is adequate and further testing under TSCA Section 4 is not warranted.

December 29, 1982 -- 47 FR 58020
NTP chronic and mutagenic effects testing, together with manufacturers' testing, make it unnecessary to require Section 4A testing. (TR-447) 75-05-8
Notice Pyridine EPA notice that testing under TSCA Section 4 is not warranted.

December 29, 1982 -- 47 FR 58031
Sufficient data have been or are being developed on Pyridine for carcinogenicity and chronic effects by the NTP. (TR-283) 110-86-1
Notice Hexachlorocyclopentadiene EPA notice that testing under TSCA Section 4 is not warranted.

December 29, 1982 -- 47 FR 58023
NTP is conducting a 2-year inhalation oncogenicity bioassay. (TR-437) 77-47-4
Notice Isophorone EPA notice that it is not initiating TSCA Section 4A test requirements because of adequate ongoing tests.

January 6, 1983 -- 48 FR 727
NTP long-term bioassay, together with manufacturers' tests, make it unnecessary to require Section 4A testing. (TR-291) 78-59-1
Notice Formamide EPA notice of determination not to require additional health effects testing.

May 23, 1983 -- 48 FR 23098
NTP genotoxicity testing, together with importer's subchronic effects testing, make it unnecessary to require Section 4A testing. 75-12-7
Notice 4,4-Methylenedianiline EPA notice that it is not initiating a TSCA Section 4A health effects test rule because recent NTP study shows MDA to be carcinogenic in rats and mice.

July 11, 1983 -- 48 FR 31806
The data from the NTP bioassay are sufficient...and further oncogenicity testing is unnecessary. (TR-248) 13552-44-8
Notice 4,4-Methylenedianiline EPA ANPR of EPA/OSHA joint initiation of regulatory action under TSCA and OSHA Act.

September 20, 1983 -- 48 FR 42898
NTP bioassay indicated that the dihydrochloride salt of 4,4-MDA is carcinogenic in both sexes of rats and mice. (TR-248) 13552-44-8
Notice Bis(2-Ethylhexyl)Terephthalate; Response to the Interagency Testing Committee EPA notice that it is not initiating TSCA Section 4 test requirement rulemaking because ongoing tests are expected to provide sufficient information to predict toxicity.

November 14, 1983 -- 48 FR 51845
Two chemicals similar to metabolites of DOTP have been nominated for genotoxicity testing by the NTP. 104-76-7
4376-20-9
Notice Tris EPA notice that it is not initiating TSCA Section 4A test requirement rulemaking because ongoing tests are expected to provide sufficient information to predict toxicity.

November 14, 1983 -- 48 FR 51842
NTP testing of compounds containing the 2-ethylhexyl moiety. (TR-274) 78-42-2
Notice Formaldehyde EPA notice of reconsideration as to whether TSCA Section 4f priority consideration is appropriate.

November 18, 1983 -- 48 FR 52507
Federal Panel on Formaldehyde, formed by several agencies under the aegis of NTP, reviewed study of Formaldehyde. 50-00-0
Proposed Rule Chlorinated Benzenes EPA proposed rule to withdraw most testing requirements.

December 7, 1983 -- 48 FR 54836
NTP mutagenesis testing of Monochlorobenzene; 1,2,4-Trichlorobenzene and Pentachlorobenzene. NTP toxicity testing of Monochlorobenzene,ortho and para-Dichlorobenzenes. (TR-255) (TR-261) 120-82-1
108-90-7
608-93-5
95-50-1
Proposed Rule Cyromazine EPA issuance of emergency exemptions for use of an unregistered pesticide.

December 14, 1983 -- 48 FR 55624
Applicant's earlier request for specific exemption was denied because of results of NTP study of Melamine, a metabolite of Cyromazine. 108-78-1
Proposed Rule Hexafluoropropylene Oxide EPA proposed test rule under TSCA Section 4.

December 30, 1983 -- 48 FR 57686
NTP planning to conduct Ames assay. 428-59-1
Notice Ethylene Oxide EPA notice of determination not to require testing.

January 3, 1984 -- 49 FR 200
NTP chronic inhalation bioassay. (TR-326) 75-21-8
Other Anilines EPA ANPR to require health and environmental effects testing.

January 3, 1984 -- 49 FR 108
NTP confirmatory study of effects of dietary exposure to 4-Chloroaniline Hydrochloride. (TR-351) 20265-96-7
Notice 1,2-Butylene Oxide EPA notice of determination not to require testing.

January 4, 1984 -- 49 FR 503
NTP inhalation bioassay of 1,2-butylene oxide. (TR-329) 106-88-7
Other Certain Alkyl Epoxides EPA ANPR on testing under TSCA

January 4, 1984 -- 49 FR 449
NTP subchronic study on 1,2-Epoxyhexadecane applied dermally. 7320-37-8
Proposed Rule Hydroquinone EPA Proposed test rule under TSCA Section 4.

January 4, 1984 -- 49 FR 438
EPA is not proposing oncogenicity testing of Hydroquinone since NTP is currently conducting a 2-year bioassay. (TR-366) 123-31-9
Proposed Rule 1,2-Dichloropropane EPA proposed test rule

January 6, 1984 -- 49 FR 899
NTP 2-year bioassay (TR-263) 78-87-5
Notice Isophorone EPA notice of decision to adopt negotiated testing program.

January 17, 1984 -- 49 FR 2012
NTP's initiation of a long-term bioassay, together with CMA proposed testing, make it unnecessary to require TSCA Section 4 testing. (TR-291) 78-59-1
Proposed Rule Cyromazine EPA proposed temporary feed additive regulation.

April 27, 1984 -- 49 FR 18130
NTP bioassay of Melamine, a metabolite of Cyromazine, showed significant increase in bladder carcinomas in male rats. (TR-245) 108-78-1
Notice Cyromazine EPA proposed rule to establish feed additive regulation setting temporary maximum permissible residue level in poultry feed.

April 27, 1984 -- 49 FR 18120
NTP bioassay of Melamine, a metabolite of Cyromazine, showed a significant increase in bladder carcinomas in male rats. (TR-245) 108-78-1
Notice Cyromazine EPA notice of proposed conditional registration under FIFRA for temporary period.

April 27, 1984 -- 49 FR 18172
As a result of the reported oncogenicity of Melamine in the NTP bioassay, the agency stopped the Cyromazine registration process...until it could review the NTP bioassay. (TR-245) 108-78-1
Other 1,3-Butadiene EPA ANPR and invitation to submit data on controlling exposures, following recent bioassays establishing carcinogenicity.

May 15, 1984 -- 49 FR 20524
NTP chronic oncology studies show carcinogenicity in both sexes of rats and mice; NTP planning further teratology testing. (TR-288) 106-99-0
Notice Calcium, Cobalt, and Lead Napthenates EPA notice of determination not to require testing.

May 21, 1984 -- 49 FR 21411
NTP planning testing of cobalt naphthenate and cobalt sulfate; NTP currently testing naphthenic acid; NTP has completed mutagenicity tests of lead naphthenate. 10124-43-3
61789-51-3
Other Formaldehyde EPA ANPR announcing decision that TSCA Section 4f priority consideration is applicable in 2 exposure categories, and initiating a regulatory investigation.

May 23, 1984 -- 49 FR 21870
Federal Panel on Formaldehyde, under the aegis of NTP, reviewed CIIT's bioassay methodology from CIIT inhalation study showing nasal cancer in rats. 50-00-0
Notice Toluene EPA notice of decision not to regulate under CAA based on studies showing toluene not to pose a significant risk to public health. This decision is not relevant to regulation of toluene as a VOC under the air quality standards for ozone.

May 25, 1984 -- 49 FR 22195
NTP is currently conducting a lifetime bioassay on toluene. (TR-371) 108-88-3
Proposed Rule Fluoroalkenes EPA notice of proposed decision to adopt a negotiated testing program in lieu of required testing.

June 4, 1984 -- 49 FR 23112
NTP planning testing of tetrafluoroethane and vinylidene. (TR-228) 75-35-4
Notice Bis(2-Ethylhexyl) Terephthalate EPA notice of decision to adopt negotiated testing program.

June 4, 1984 -- 49 FR 23110
NTP has nominated two chemicals similar to the metabolites of DOTP for genotoxicity testing. 104-76-7
4376-20-9
Proposed Rule Volatile Synthetic Organic Chemicals EPA proposed rule for National Primary Drinking Water Regulations establishing Recommended Maximum Contaminant Levels for several VOC's.

June 12, 1984 -- 49 FR 24330
NTP studies of trichlorethylene; 1,1,1-trichlorethane; 1,1-dichloroethylene; and p-dichlorobenzene. (TR-319) (TR-228) (TR-243) (TR-273) (TR-262) 106-46-7
79-01-6
71-55-6
75-35-4
Proposed Rule Dichloromethane EPA proposed rule to withdraw testing requirements under TSCA. Evaluation of data indicates dichloromethane does not present unreasonable risks.

June 19, 1984 -- 49 FR 25009
EPA expects NTP inhalation bioassay to be sufficient to characterize oncogenic hazards. (TR-306) 75-09-2
Proposed Rule Nitrobenzene EPA proposed rule to withdraw testing requirements under TSCA. Ongoing government and manufacturers' tests are expected to meet all testing.

June 19, 1984 -- 49 FR 25013
EPA concluded that NTP oncogenicity and subchronic effects testing would be sufficient and so didn't require further testing for these effects. 98-95-3
Final Rule 1,1,1-Trichloroethane EPA final rule identifying specific chemical substance and mixture testing requirements.

October 10, 1984 -- 49 FR 39810
EPA did not propose chronic effects or oncogenicity testing because an NTP study is expected to provide sufficient information. (TR-262) 71-55-6
Proposed Rule [(Dinitrophenyl)Azo]-[2,4-Diamino-5-Methoxybenzene] Derivatives; Proposed Determination of Significant New Uses EPA proposed rule promulgating a significant new use rule under TSCA Section 5.

October 25, 1984 -- 49 FR 42960
NTP and others have shown carcinogenic potential of close structural analogues of phenylenediamines. N/A
Proposed Rule Certain Polyamino Chemical Substances EPA proposed rule promulgating a significant new use rule under TSCA Section 5.

December 27, 1984 -- 49 FR 50209
NTP bioassay indicated that the dihydrochloride salt of Methylenedianiline is carcinogenic in both sexes of rats and mice. (TR-248) 13552-44-8
Final Rule Dioxin-containing Wastes EPA final rule listing certain dioxin-containing wastes as acute hazardous wastes.

January 14, 1985 -- 50 FR 1978
Re-evaluation by NTP of NCI study of HXCDD. (TR-202) 57653-85-7
Notice Methylene Chloride EPA notice of initiation of accelerated review under TSCA Section 4.

May 14, 1985 -- 50 FR 20126
NTP inhalation studies demonstrated carcinogenicity. (TR-306) 75-09-2
Notice Cyromazine EPA notice of determination to issue conditional registration under FIFRA.

May 15, 1985 -- 50 FR 20373
NTP bioassay demonstrated that high dose ingestion induced cancer. NTP study of Melamine, a metabolite of Cyromazine. (TR-245) 108-78-1
Final Rule 2-Ethylhexanoic Acid EPA proposed rule on testing under TSCA Section 4.

May 17, 1985 -- 50 FR 20679
NTP tests of four chemicals containing 2-ethylhexyl showed them to be animal oncogenes; NTP plans test of 2-ethylhexanol. 104-76-7
Proposed Rule Bisphenol A EPA proposed rule on testing under TSCA Section 4.

May 17, 1985 -- 50 FR 20691
"EPA finds that sufficient data are available from the NTP bioassay report to reasonably predict that ingested BPA is not oncogenic...EPA believes appropriate developmental toxicity testing has been conducted at NTP." (TR-215) 80-05-7
Final Rule Diethylenetriamine EPA final rule on testing requirements under TSCA Section 4.

May 23, 1985 -- 50 FR 21398
NTP conducted Ames Salmonella/Microsome Plate Test with negative results. 111-40-0
Notice Methyl Chloroform EPA notice of assessment as a potentially toxic air pollutant and determination that regulation under CAA is not warranted.

June 10, 1985 -- 50 FR 24314
EPA awaiting results of NTP carcinogenicity bioassay. (TR-262) 71-55-6
Proposed Rule 4,4-Methylenedianiline EPA notice of decision to refer to OSHA under TSCA Section 9.

July 5, 1985 -- 50 FR 27674
NTP study demonstrated that dihydrochloride salt of 4,4-MDA is carcinogenic in both sexes of rats and mice. (TR-248) 13552-44-8
Notice Chlorinated Benzenes EPA notice of intent not to regulate chlorinated benzenes under CAA.

August 13, 1985 -- 50 FR 32628
NTP carcinogenesis testing of 1,4-dichlorobenzene is currently underway. (TR-319) 106-46-7
Other Manganese EPA decision not to regulate manganese under CAA.

August 13, 1985 -- 50 FR 32627
Regulation not needed at this time because NTP has scheduled carcinogenicity testing and is conducting mutagenicity studies. (TR-428) 10034-96-5
Proposed Rule Benzyl Butyl Phthalate EPA proposed test rule.

September 6, 1985 -- 50 FR 36446
NTP planned reproduction effects and cancer studies make it unnecessary to require health effects testing at this time. (TR-458) 85-68-7
Notice Chloroprene EPA notice of intent not to regulate and solicitation of information.

September 27, 1985 -- 50 FR 39632
Ongoing NTP carcinogenicity and reproductive hazard study. 126-99-8
Notice Hexachlorocyclopentadiene EPA notice of intent not to regulate and solicitation of information.

October 1, 1985 -- 50 FR 40154
Ongoing NTP study. (TR-437) 77-47-4
Other Dioxin-containing wastes EPA tentative denial of petition to amend the rule listing certain dioxin-containing wastes as acute hazardous wastes.

October 8, 1985 -- 50 FR 41125
Reference to NCI/NTP bioassay of HXCDD. (TR-202) 57653-85-7
Notice 1,3-Butadiene EPA notice of intent to list under CAA Section 112 as a potentially toxic air pollutant.

October 10, 1985 -- 50 FR 41466
Reference to NTP mouse study which was prematurely terminated due to excess deaths. 106-99-0
Other 1,3-Butadiene EPA referral to OSHA under TSCA Section 9.

October 10, 1985 -- 50 FR 41393
Reference to NTP report on toxicological and carcinogenesis studies. (TR-288) 106-99-0
Other Methylene Chloride EPA ANPR announcing initiation of comprehensive regulatory investigation.

October 17, 1985 -- 50 FR 42037
NTP inhalation bioassay demonstrated carcinogenicity in two species. (TR-306) 75-09-2
Proposed Rule 2-Mercaptobenzothiazole EPA proposed rule requiring testing under TSCA Section 4.

November 6, 1985 -- 50 FR 46121
NTP carcinogenesis study in progress. (TR-332) 149-30-4
Proposed Rule Fluoroalkenes EPA proposed rule requiring testing.

November 6, 1985 -- 50 FR 46133
NTP study of vinylidene fluoride. 75-38-7
Proposed Rule Synthetic Organic Chemicals, Inorganic Chemicals, and Microorganisms EPA proposed rule to establish Recommended Maximum Contaminant Levels as part of the National Primary Drinking Water Regulation under the Safe Drinking Water Act.

November 13, 1985 -- 50 FR 46936
NTP studies of 1,2-dichloropropane; monochlorobenzene; dichlorobenzene; 1,2 dibromoethane; pentachlorophenol; toluene; xylene; 2,3,7,8-TCDD; and ingestion of asbestos. (TR-327) (TR-371) (TR-319) (TR-263) (TR-349) (TR-255) (TR-210) (TR-261) 1330-20-7
108-88-3
106-46-7
78-87-5
1746-01-6
87-86-5
95-50-1
106-93-4
108-90-7
12001-28-4
12001-29-5
12172-73-5
14567-73-8
Proposed Rule Pentabromoethylbenzene EPA proposed rule on testing under TSCA Section 4.

November 13, 1985 -- 50 FR 46785
NTP tests were performed using Salmonella typhimurium. 85-22-3
Notice Volatile Synthetic Organic Chemicals EPA notice of new evidence and requests for comment on new NTP report on tetrachloroethylene.

November 13, 1985 -- 50 FR 47025
EPA reopened comment period specifically to provide opportunity for comment on NTP report. 127-18-4
Final Rule Volatile Synthetic Organic Chemicals EPA final rule promulgating National Primary Drinking Water regulations.

November 13, 1985 -- 50 FR 46880
NTP rat and mice inhalation bioassay of tetrachloroethylene demonstrated carcinogenicity in both species. NTP gavage bioassay of p-dichlorobenzene showed carcinogenicity in both sexes of mice and female rats showed no evidence of carcinogenicity. (TR-319) (TR-311) 106-46-7
127-18-4
Final Rule Propylene Oxide EPA final rule to require testing for developmental toxicity under TSCA Section 4.

November 27, 1985 -- 50 FR 48762
NTP 2-year studies on rats and mice demonstrated evidence of carcinogenicity. (TR-267) 75-56-9
Proposed Rule Hazardous Waste Management System EPA proposed rule to list used oil as hazardous waste.

November 29, 1985 -- 50 FR 49258
Reference to two NTP perchloroethylene inhalation studies of mice and rats which EPA is evaluating and expects to result in a B-2 classification of perc. (TR-311) 127-18-4
Final Rule Hydroquinone EPA final rule requiring testing under TSCA Section 4.

December 20, 1985 -- 50 FR 53145
Carcinogenicity testing not required because NTP conducting 2-year bioassay. (TR-366) 123-31-9
Notice Trichloroethylene EPA notice of assessment of TCE as a potentially toxic air pollutant and intent to list under CAA Section 112. (This rule was clarified on 3/5/86.)

December 23, 1985 -- 50 FR 52422
"The conclusion that TCE is a probable carcinogen is based on the findings of the NCI (1976) and NTP (1982) mouse studies..." (TR-243) 79-01-6
Notice Perchloroethylene EPA notice of assessment of perc as a potentially toxic air pollutant and intent to list under CAA Section 112.

December 26, 1985 -- 50 FR 52880
NTP inhalation study, which showed a carcinogenic potential in male rats and both sexes of mice, "has resulted in this notice of intent to list." (TR-311) 127-18-4
Proposed Rule Hydroquinone EPA proposed rule on testing standards for hydroquinone.

December 30, 1985 -- 50 FR 53160
NTP 2-year gavage study will provide data for comparison with dermal contact data from required toxicokinetic studies. (TR-366) 123-31-9
Notice Formamide EPA notice of decision not to require further testing under TSCA Section 4, pursuant to federal district court ruling that EPA, in lieu of a negotiated testing agreement, require testing or give reasons for not requiring testing.

February 27, 1986 -- 51 FR 6929
NTP testing of formamide over 5 doses in 4 strains of salmonella; no indication of mutagenic activity seen. 75-12-7
Notice Perchloroethylene EPA correction of previous FR notice to assess perchloroethylene as a potentially toxic air pollutant under the Clean Air Act Section 112.

March 5, 1986 -- 51 FR 7718
NTP toxicology and carcinogenesis studies in rats and mice. TR-311. 127-18-4
Proposed Rule Pentachloroethane EPA proposed rule promulgating a significant new use rule under TSCA Section 5. (Final rule published 9/9/86.)

March 24, 1986 -- 51 FR 10024
NTP bioassay demonstrated evidence of carcinogenicity in both sexes of rats and mice. TR-232. 76-01-7
Final Rule Cresols EPA final rule to require testing under TSCA Section 4.

April 28, 1986 -- 51 FR 15771
NTP is planning range-finding and subchronic studies. (TOX-09) 1319-77-3
Final Rule Methylcyclopentane and Commercial Hexane EPA proposed rule to require testing under TSCA Section 4.

May 15, 1986 -- 51 FR 17854
NTP is conducting a subchronic inhalation toxicity test and is supporting reproductive and developmental toxicity testing. (TOX-02) 110-54-3
96-37-7
Proposed Rule 8 Polybrominated Biphenyls (PBB's) and Tris EPA proposed rule promulgating a significant new use rule under TSCA Section 5.

July 7, 1986 -- 51 FR 24555
Reference to NTP bioassay of polybrominated biphenyl mixture. TR-244. 67774-32-7
Final Rule Chlorinated Benzenes EPA final rule to require testing under TSCA Section 4.

July 8, 1986 -- 51 FR 24657
NTP studies of 1,2,4,5-TCB, 1,2-DCB, & 1,4-DCB. (TR-319) (TR-255) 106-46-7
95-50-1
95-94-3
Notice Toluenediamines EPA notice of termination of investigation of occupational exposure in light of evidence of carcinogenicity.

July 10, 1986 -- 51 FR 25070
Bioassays conducted under the NTP have demonstrated that 2,4-Toluenediamine causes cancer in lab animals. (TR-162) 95-80-7
Proposed Rule 11-Aminoundecanoic Acid EPA proposed rule promulgating a significant new use rule under TSCA Section 5.

July 22, 1986 -- 51 FR 26273
NTP carcinogenesis bioassay shows 11-AA induces malignant tumor response in male rats and also can cause non-oncogenic effects in lab animals. TR-216. 2432-99-7
Proposed Rule 1,1-Dichloroethylene EPA proposed rule to require testing under TSCA Section 4.

August 12, 1986 -- 51 FR 28840
NTP's 2-year gavage study was the "only study considered by EPA to have an adequate protocol to demonstrate a chemical's lack of oncogenic potential," although this study may not have achieved a sufficiently high dose." TR-228 75-35-4
Final Rule 1,2-Dichloropropane EPA final rule to require testing under TSCS Section 4.

September 9, 1986 -- 51 FR 32079
NTP 2-year bioassay "is adequate to determine the oncogenic potential of DCP." Also notes NTP concern over DCP in drinking water as indicating need for oral exposure in testing. TR-263. 78-87-5
Final Rule Pentachloroethane EPA final rule promulgating a significant new use rule under TSCA Section 5.

September 9, 1986 -- 51 FR 32077
NTP bioassay demonstrated limited evidence of carcinogenicity in lab animals. TR-232. 76-01-7
Other Dioxin-containing wastes EPA denial of petition to amend rule listing certain dioxin-containing wastes as acute hazardous wastes.

September 15, 1986 -- 51 FR 32670
NTP bioassay study of HXCDD referred to in docket. TR-198. 57653-85-7
Final Rule Bisphenol A EPA final rule to require a 90-day inhalation subchronic toxicity study with particular emphasis on pulmonary effects, under TSCA Section 4.

September 18, 1986 -- 51 FR 33047
NTP oral gavage bioassay provides needed data to evaluate subchronic toxicity of PBA. TR-215. 80-05-7
Other Guidelines for Assessing Health Risks of Environmental Pollutants EPA issuance of guidelines for carcinogen risk assessment, mutagenicity risk assessment, health risk assessment of chemical mixtures, and health assessment of suspect developmental toxicants.

September 24, 1986 -- 51 FR 33992
Each of these 4 EPA guidelines makes reference to NTP studies. N/A
Notice Nickel Subsulfide and Nickel Carbonyl EPA notice of determination that no Federal regulation is warranted at this time under CAA.

September 25, 1986 -- 51 FR 34135
NTP and NIEHS are currently conducting animal bioassays of selected nickel compounds. (TR-454) (TR-451) (TR-453) 10101-97-0
1313-99-1
12035-72-2
Notice 1,3-Dichloropropene EPA notice of special review of pesticides containing 1,3-dichloropropene.

October 8, 1986 -- 51 FR 36160
NTP gavage study showed clear evidence of carcinogenicity. TR-269. 542-75-6
Final Rule 2-Ethylhexanoic Acid EPA final rule to require testing under TSCA Section 4.

November 6, 1986 -- 51 FR 40318
Reference to NTP nomination of compounds containing the 2-ethylhexyl moiety for mutagenicity testing. 149-57-5
Proposed Rule 2-Ethylhexanol EPA proposed rule on testing under TSCA Section 4.

December 19, 1986 -- 51 FR 45487
Reference to study of 2-Ethyl-1-hexanol supported by NIEHS. 104-76-7
Notice Pentachlorophenol EPA notice of decision to cancel registrations for all products containing pentachlorophenol for all non-wood uses except pulp/paper mill, oil well operations, and cooling tower uses.

January 21, 1987 -- 52 FR 2282
EPA requested that NTP reexamine female rat liver lesions from NCI study. 87-86-5
Final Rule 8 Polybrominated Biphenyls (PBB's) and Tris EPA final rule promulgating a significant new use rule under TSCA Section 5.

January 26, 1987 -- 52 FR 2699
Reference to NTP bioassay of polybrominated biphenyl mixture. TR-244. 67774-32-7
Proposed Rule P-Dichlorobenzene EPA proposed rule to regulate p-dichlorobenzene as a probable human carcinogen under the Safe Drinking Water Act by amending the Maximum Contaminant Level Goal (MCLG).

April 17, 1987 -- 52 FR 12876
Based upon the results of the above studies and specifically the conclusions of the NTP report (bioassay of p-dichlorobenzene), EPA is proposing to amend the MCLG. TR-319. 106-46-7
Notice 2,4,5-Trichlorophenol EPA notice of intent to cancel registration as active ingredient for all uses.

April 29, 1987 -- 52 FR 15549
References to several NTP studies of 2,3,7,8-TCDD, a contaminant of 2,4,5-TCP. (TR-209) 1746-01-6
Proposed Rule Cyclohexane EPA proposed rule on test standards and requirements under TSCA Section 4.

May 20, 1987 -- 52 FR 19096
Reference to study of cyclohexane supported by NIEHS. 110-82-7
Final Rule 11-Aminoundecanoic Acid EPA final rule promulgating a significant new use rule under TSCA Section 5.

May 28, 1987 -- 52 FR 19860
NTP bioassay showed limited evidence of carcinogenicity in animals. (TR-216) 2432-99-7
Final Rule Polyhalogenated Dibenzo-p-dioxins and Dibenzofurans (HDD and HDF) EPA final rule under TSCA to require testing for certain chemicals for HDD/HDF contamination.

June 5, 1987 -- 52 FR 21412
Decabromodiphenyl Oxide, in grade used in NTP research, is exempt from this rule because NTP studies showed equivocal evidence of carcinogenicity in male mice and no evidence in female mice. (TR-309) 1163-19-5
Final Rule Fluoroalkenes EPA final rule to require testing under TSCA Section 4.

June 8, 1987 -- 52 FR 21516
NTP subchronic inhalation study of vinylidene fluoride. 75-38-7
Final Rule 8 Volatile Synthetic Organic Chemicals (VOC's) EPA final rule for National Primary Drinking Water Regulations setting maximum contaminant levels and monitoring requirements for 8 VOC's under the Safe Drinking Water Act (SDWA).

July 8, 1987 -- 52 FR 25690
NTP chronic bioassay of rats and mice showed clear evidence of carcinogenicity of para-dichlorobenzene, TR-319. 106-46-7
Notice Drinking Water EPA notice of 7 substituted contaminants on SDWA list of 83 contaminants.

July 8, 1987 -- 52 FR 25720
Dibromomethane (proposed for removal from list) is being considered for NTP testing. Ethylbenzene (proposed for addition to list) is being tested by NTP. 100-41-4
106-93-4
Final Rule 1,2,4,5-Tetrachlorobenzene EPA final rule modifying the test substance purity requirements under TSCA Section 4.

July 15, 1987 -- 52 FR 26477
NTP-identified test material having 99+% purity not available to manufacturers. 95-94-3
Notice Ethylene Bisdithiocarbamate (EBDC) EPA notice of initiation of special review to determine whether regulatory action is required.

July 17, 1987 -- 52 FR 27172
NTP is currently conducting an oncogenicity study of ETU, a common contaminant, degradation product, and metabolite of EBDC. (TR-388) 96-45-7
Proposed Rule Butyl Benzyl Phthalate EPA proposed rule to delete this chemical from SARA Section 313 list of chemicals for which release reporting is required.

July 20, 1987 -- 52 FR 27226
NTP bioassay results constitute equivocal evidence of carcinogenicity. (TR-213) 85-68-7
Final Rule 2-Ethylhexanol EPA final rule to require a 2-year oncogenicity bioassay under TSCA Section 4.

August 3, 1987 -- 52 FR 28698
Reference to studies of 2-Ethylhexanol supported by NIEHS. 104-76-7
Notice CPSC statement of enforcement policy for household products containing methylene chloride.

September 14, 1987 -- 52 FR 34698
NTP inhalation bioassay showed clear evidence of carcinogenicity in female rats and male and female mice. (TR-306) 75-09-2
Final Rule Polyamine-epichlorohydrin FDA final rule amending food additive regulations concerning paper and paperboard components.

December 10, 1987 -- 52 FR 46744
Reference to NCI/NTP bioassay of 1,2-dichloroethane. (TR-055) 107-06-2
Final Rule Commercial Hexane EPA final rule to require testing under TSCA Section 4.

February 5, 1988 -- 53 FR 3382
Description of NTP dosing regimen in discussion of subchronic test standards. 110-54-3
Notice Dichlorvos EPA notice of initiation of special review of determine whether registration should be cancelled or otherwise amended in light of carcinogenic and other health effects.

February 24, 1988 -- 53 FR 5542
"Based on the NTP oncogenicity studies and chronic toxicity studies, in conjunction with exposure assessments of dietary, worker, residential, and pet risks, EPA has determined that all uses of dichlorvos have met the criterion for initiation of Special Review." (TR-342) 62-73-7
Final Rule Diethylene Glycol Butyl Ether and Diethylene Glycol Butyl Ether Acetate EPA final rule to require testing under TSCA Section 4.

February 26, 1988 -- 53 FR 5932
NTP currently is conducting an oncogenicity study of structurally similar glycol ethers. 112-34-5
Proposed Rule Isopropanol EPA proposed rule to require testing under TSCA Section 4.

March 16, 1988 -- 53 FR 8638
"The only adequate study" of mutagenicity is a salmonella reverse mutation assay conducted by NTP. 67-63-0
Notice Naphthalene EPA notice of assessment results under Clean Air Act, concluding that the health data base is insufficient to warrant regulation under the CAA.

March 21, 1988 -- 53 FR 9138
NTP 2-year inhalation study is currently in progress. (TR-410) 91-20-3
Notice RCRA Hazardous Waste Identification EPA notice regarding strategy for setting compound-specific dilution/attenuation factors in the Toxicity Characteristic used by waste generators to determine whether their solid wastes are hazardous.

May 19, 1988 -- 53 FR 18024
NTP studies of 1,4-dichlorobenzene, Pyridine, and Methylene Chloride (TR-306) (TR-319) (TR-283) 75-09-2
106-46-7
110-86-1
Proposed Rule Melamine EPA proposed rule to delete melamine from list of toxic chemicals for which toxic chemical release reporting is required under SARA Section 313.

June 20, 1988 -- 53 FR 23128
NTP bioassay resulted in statistically significant increase in carcinomas in male rats. (TR-245) 108-78-1
Proposed Rule Benzene EPA proposed rule on setting NESHAP applicable to benzene equipment leaks, ethylbenzene/styrene and maleic anhydride process vents, benzene storage vessels, and coke byproduct recovery plants.

July 28, 1988 -- 53 FR 28496
NTP 2-year chronic study of mice and rats orally exposed found significant incidence of cancers at multiple sites in both sexes and both species. (TR-289) 71-43-2
Notice Certain Chemicals in Anilines Category EPA notice of termination of rulemaking because there is no basis for finding of unreasonable risk of injury to health or the environment.

August 19, 1988 -- 53 FR 31814
Reference to study of 4-chloro-2-nitroaniline supported by NIEHS. 89-63-4
Final Rule Aniline & 7 Substituted Anilines EPA final rule regarding enforceable testing consent orders under TSCA.

August 19, 1988 -- 53 FR 31804
References to studies of p-chloroaniline and 4-nitroaniline supported by NIEHS. 106-47-8
100-01-6
20265-96-7
Final Rule 2-Mercaptobenzothiazole EPA final rule to require testing under TSCA Section 4.

September 7, 1988 -- 54 FR 34514
NTP chronic and subchronic studies of MBT. (TR-332) 149-30-4
Proposed Rule Methyl Ethyl Ketoxime EPA proposed rule to require testing under TSCA Section 4.

September 15, 1988 -- 53 FR 35838
Reference to NTP study of methyl ethyl ketone. 78-93-3
Proposed Rule Hazardous Waste Management System EPA proposed rule to amend RCRA regulations to list as hazardous 4 additional wastes from wood preserving and surface protection processes.

December 30, 1988 -- 53 FR 53282
Reference to NTP study demonstrating carcinogenicity of pentachlorophenol. (TR-349) 87-86-5
Notice Captan EPA notice of intent to cancel registrations.

February 24, 1989 -- 54 FR 8116
Rationale for combining organ sites and tumor sites in categorizing captan as a probable human carcinogen was based on NTP list of acceptable organ combinations. (TR-015) 133-06-2
Final Rule Glycol Ethers EPA final rule on enforceable testing consent order.

April 4, 1989 -- 54 FR 13470
References to NTP studies of ethylene glycol monomethyl ether, 2-ethoxyethanol, and ethylene glycol monobutyl ether. 109-86-4
110-80-5
111-76-2
Proposed Rule Dinitrobenzenes, Allyl Alcohol, Diethylamine, 2,3-Dichloropropene, Isosafrole, Creosote, Dinitrotoluene, Toluenediisocyanate EPA proposed rule to add these chemicals to list of chemicals for which release reporting is required under SARA Section 313.

April 21, 1989 -- 54 FR 16138
NTP Annual Report on Carcinogens is one of the 4 data sources used by EPA in making carcinogenic evaluations of Section 313 determinations. 121-14-2
26471-62-5
109-89-7
8021-39-4
Proposed Rule Copper Phthalocyanine Pigments EPA proposed rule to exempt Pigments Blue 15, Green 7, and Green 36 from SARA 313 release reporting requirements.

May 15, 1989 -- 54 FR 20866
NTP oral studies of PB-15 and PG-7 showed no signs of compound-related toxicity. 147-14-8
1328-53-6
Proposed Rule Drinking Water EPA proposed rule on maximum contaminant level goals and National Primary Drinking Water Regulations for 30 synthetic organic chemicals and 8 inorganic chemicals.

June 23, 1989 -- 54 FR 22062
NTP bioassays of chrysotile asbestos, 1,2-dichloropropane, monochlorobenzene, pentachlorophenol,styrene, tetrachloroethylene, and xylenes are cited. (TR-327) (TR-263) (TR-185) (TR-311) (TR-349) (TR-261) (TR-295) 78-87-5
100-42-5
87-86-5
108-90-7
12001-29-5
127-18-4
1330-20-7
Final Rule Asbestos EPA final rule under TSCA 6 to prohibit future manufacture, importation, processing, and distribution in commerce of asbestos in almost all products.

July 12, 1989 -- 54 FR 29460
Reference to NTP toxicology and carcinogenesis studies of chrysotile asbestos. (TR-246) (TR-295) 12001-29-5
Final Rule Reportable quantities: Methyl Isocyanate (624-83-9), Aluminum Thiosulfate, and 258 other substances EPA final rule retaining statutory RQ for MIC, delisting ammonium thiosulfate, and adjusting the RQ's of 258 hazardous substances.

July 12, 1989 -- 54 FR 33426
Use of NTP report on carcinogens used as an initial screen for substances to be evaluated for potential carcinogenicity. MIC studies documented in EHP volume 72 utilized in decision to retain MIC. 624-83-9
Final Rule Reportable Quantities: 1,4-dioxane, 2-ethoxyethanol, ethylene oxide, 2-nitropropane, perchloroethylene, and saccharin. EPA final rule adjusting the reportable quantities (RQ) of these six substances; hazardous substance releases in quantities equal to or greater than their RQ's must be reported to the National Response Center.

August 14, 1989 -- 54 FR 33418
"The NTP annual reports (on carcinogens) and IARC monographs are used only as an initial screen for substances to be evaluated for potential carcinogenicity by the Agency. EPA follows the procedures set out in its Guidelines for Carcinogen Risk Assessment to make this determination." 75-21-8
110-80-5
79-46-9
123-91-1
81-07-2
Final Rule Methyl Ethyl Ketoxime (96-29-7) EPA final rule under TSCA 4 to require testing for oncogenicity, mutagenicity, developmental toxicity, reproductive toxicity, neurotoxicity, and pharmacokinetics.

September 13, 1989 -- 54 FR 37799
Reference to NTP research on MEKA and other NTP studies relevant to the testing requirements. 96-29-7
Notice Inert Ingredients in Pesticides EPA notice for revision of lists of inert ingredients of toxicological concern.

November 22, 1989 -- 54 FR 48314
Based on an NTP bioassay di-(2-ethylhexyl)adipate was moved to List 1 ("Inerts of Toxicological Concern") from List 3 ("Inerts of Unknown Toxicity") (TR-212) 103-23-1
Notice Ethylene Bisdthiocarbamate (EBDC) Pesticides EPA Notice of Preliminary Determination to propose cancellation of certain registrations of EBDC products and propose modifications of registrations not cancelled.

December 20, 1989 -- 54 FR 52158
NTP carcinogenicity studies of ethylene thiourea (ETU) (CAS: 96-45-7), a common contaminant, metabolite, and degradation product of EBDCs. (TR-388) 96-45-7
Other National Primary and Secondary Drinking Water Regulations; Fluoride EPA is soliciting information that has a bearing on the current standards for fluoride in drinking water.

January 3, 1990 -- 55 FR 160
EPA notes that the NTP is in the process of completing a two-year bioassay on fluoride which may provide additional insights. (TR-393) 7681-49-4
Other Chrome Antimony Titanium Buff Rutile; Toxic Chemical Release Reporting; Community Right-to-Know EPA is denying a petition to exempt Chrome Antimony Titanium Buff Rutile from reporting under the Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA)

January 8, 1990 -- 55 FR 650
Based on the 4th Annual Report on Carcinogens, the NTP considers all chromium compounds to be potential carcinogens. (ROC) N/A
Final Rule National Primary and Secondary Drinking Water Regulations; Synthetic Organic Chemicals and InorganicChemicals EPA is proposing maximum contaminant level goals and National Primary Drinking Water Regulations for organic and inorganic chemicals.

July 25, 1990 -- 55 FR 30370
The EPA used data from the following NTP studies: di(ethylhexyl)adipate, dichloromethane, hexachlorocyclopentadiene, di(2-ethylhexl)phthalate, butylbenzyl phthalate,and tetrachlorodibenzo-p-dioxin. (TR-306) (TR-201) (TR-209) (TR-217) (TR-213) (TR-212) 75-09-2
77-47-4
1746-01-6
117-81-7
85-68-7
103-23-1
Proposed Rule Pesticide Tolerances for Oxytetracycline This document proposes that tolerances be established for residues of the pesticide oxytetracycline in or on the raw agricultural commodities cherries and tomatoes.

August 1, 1990 -- 55 FR 31194
Data from the NTP oncogenicity study in rats fed oxytetracycline was used in support of the proposed tolerances. (TR-315) 2058-46-0
Final Rule Identification and Listing of Hazardous Waste; Wood Preserving The EPA is amending its regulations under the Resource Conservation and Recovery Act by listing as hazardous three categories of wastes from wood preserving operations.

December 6, 1990 -- 55 FR 50450
Data from the NTP bioassay on commercial grade pentachlorophenol was used for designating pentachlorophenol as a Class B sub 2 carcinogen. TR-349 87-86-5
Proposed Rule Aryl Phosphate Base Stocks; Proposed Test Rule Including Reporting and Record-keeping Requirements EPA proposes that manufacturers, importers and processors of chemical substances in the category of aryl phosphate base stocks be required, under section 4 of the Toxic Substances Control Act to conduct testing.

January 17, 1992 -- 57 FR 2138
Reproductive toxicity was demonstrated in the continuous breeding protocol in Swiss mice (1988). The EPA will examine the results of the NTP 2-year bioassay on TCP before deciding whether further oncogenicity testing on any other aryl phosphate is needed. (TR-433) 1330-78-5
Notice Ethylene Bisdithiocarbamates: Notice of Intent to Cancel; Conclusion of Special Review The EPA concludes the Special Review and risk/benefit analysis of EBDCs and announces the intent to cancel registrations and to deny applications for registration for all pesticide products containing EBDCs as an active ingredient unless the registrations/applications comply with the terms and conditions of registration set forth in this Notice. The Agency has determined that use will result in unreasonable adverse effects to humans or the environment.

March 2, 1992 -- 57 FR 7484
Data from the NTP bioassay on ethylene thiourea (ETU) were used by the EPA (TR-388) 96-45-7
Notice Draft Report: A Cross-Species Scaling Factor for Carcinogen Risk Assessment Based on Equivalence of mg/kg 3/4/day The EPA, FDA, and CPSC are asking for public comments on a draft report: A Cross-Species Scaling Factor for Carcinogen Risk Assessment Based on Equivalence of mg/kg/3/4/day.

June 5, 1992 -- 57 FR 24152
Data from NCI/NTP bioassays were used to develop the report. N/A
Notice Thirtieth Report of the Interagency Testing Committee: Request for Comments Regarding Priority Testing List of Chemicals The Priority Testing List was revised by adding one chemical group, the siloxanes, and four chloralkyl phosphates.

July 9, 1992 -- 57 FR 30608
At the request of the NTP, TSCA Section 8(d) reports on health effects of bis-(4-chlorophenyl) sulfone were provided to facilitate NTP's evaluation of this chemical. 80-07-9
Final Rule Drinking Water: National Primary Drinking Water Regulations-Synthetic Organic Chemicals and Inorganic Chemicals; National Primary Drinking Water Regulations Implementation EPA is promulgating maximum contaminant level goals and National Primary Drinking Water Regulations for 18 synthetic organic and 5 inorganic chemicals.

July 17, 1992 -- 57 FR 31776
The MCLG for Di(2-ethylhexyl)adipate was derived from the NTP 2-year dietary study, TR-212. The classification of DEHP as a Group B2 (probable human) carcinogen was based on the NTP 2-year study, (TR-217) 117-81-7
103-23-1
Final Rule Chemicals: Toxic Chemical Release Reporting; Community Right-To-Know; Proposed Significant New Use Rule The EPA is partially granting a petition submitted by the Governor of New York to add 80 chemicals and 2 chemical categories to the list of toxic chemicals subject to reporting under section 313 of the Emergency Planning and Community Right-To-Know Act by proposing to add 68 chemicals and 2 chemical categories.

September 8, 1992 -- 57 FR 41020
The EPA used several NTP bioassays as sources of information. (TOX-18) (TR-403) (TR-314) (TR-237) (TR-039) (TR-00A) 1338-23-4
108-46-3
80-62-6
630-20-6
303-34-4
148-82-3
Final Decision National Ambient Air Quality Standards For Ozone. Announcement that revisions of the national ambient air quality standards for ozone are not appropriate at this time.

March 9, 1993 -- 58 FR 13008
Substantial new information has been published since the last criteria document. The NTP toxicology and carcinogenesis study on ozone (TR-440) to be peer-reviewed 11/93 was cited as an example of a study which may yield significant new information. 10028-15-6
Final Rule Pesticide Tolerance and Animal Feed Additive Regulation for Fluoride Compounds Establishment of a 3-year time-limited tolerance for residues of cryolite and/or synthetic cryolite.

May 5, 1993 -- 58 FR 26687
Data from the NTP toxicology and carcinogenesis study of sodium fluoride (TR-393) was considered in support of the tolerances. 7681-49-4
Proposed Rule C.I. Pigment Violet #23 (Carbazole Violet), C.I. Pigment Blue #15, C.I. Pigment Green #7, and FD & C Red No. 40; Tolerance Exemptions Exemption from the requirement of a tolerance be established for residues of C.I. Pigment Violet #23, C.I. Pigment Blue #15, C.I. Pigment Green #7 and FD Red No. 40 when used as inert ingredients in pesticide formulations applied to growing crops only.

June 30, 1993 -- 58 FR 34973
NTP data used to support the proposed tolerance exemptions for C.I. Pigment Blue #15 and C.I. Pigment Green #7. The NTP decided not to perform toxicology and carcinogenesis studies of C.I. Pigment Green #7 and C.I. Pigment Blue #15 based on the lack of absorption or adverse effects in a 90-day feed study in rats and mice. 147-14-8
1328-53-6
Final Rule Revocation of Food Additive Regulations for Benomyl, Mancozeb, Phosmet, and Trifluralin Revocation of certain food additive regulations for four pesticides, benomyl, mancozeb, phosmet, and trifluralin, which were included in a 1989 petition.

July 14, 1993 -- 58 FR 37862
Ethylene thiourea (ETU), a major contaminant, metabolite and breakdown product of mancozeb has been shown in the NTP toxicology and carcinogenesis study (TR-388) to induce cancer in animals. 96-45-7
Proposed Rule Pesticide Tolerance for Dimethoate Establishment of a tolerance for residues of the insecticide dimethoate in or on raw Brussels sprouts.

September 1, 1993 -- 58 FR 46147
NTP concluded that dimethoate is a mutagenic compound based on its testing for gene mutation and chromosomal aberrations. 60-51-5
Final Rule Dichlorvos: Revocation of Food Additive Tolerance Revocation of the food additive regulation for residues of the pesticide dichlorvos in or on packaged or bagged non perishable processed food.

November 10, 1993 -- 58 FR 59663
Data from the NTP toxicology and carcinogenesis study of dichlorvos (TR-342) in F344 rats showing statistically significant increases in leukemia in males at 2 dose levels was used. 62-73-7
Final Rule Acetophenone, Phenol, N,N-Dimethylaniline, Ethyl Acetate, and 2,6-Dimethylphenol; Proposed Test Rule, Notice of Opportunity to Initiate Negotiations for TSCA Section 4 Testing Consent Agreements Proposed Rule: Proposed test rule under section 4(a) of the Toxic Substances Control Act (TSCA) that would require manufacturers and processors of five chemicals, acetophenone, phenol, n, n-dimethylaniline, ethyl acetate, and 2,6-dimethylphenol, to conduct testing for certain chemical fate, health and environmental effects.

November 22, 1993 -- 58 FR 61654
The proposed rule reflects EPA's current thinking in the area of mutagenicity testing, both as an endpoint and as it leads to oncogenicity testing. This new information is partially based on data from the NTP's study of the ability of short-term tests to predict carcinogenic potential. For phenol, no additional testing for developmental effects is being proposed because NTP studies are adequate for this endpoint. For N,N-dimethylaniline, the NTP toxicology and carcinogenesis study (TR-360) identified the rat as more sensitive than the mouse to the noncarcinogenic effects on erythrocytes and spleen. 121-69-7
Proposed Rule Significant New Uses of Certain Acrylate Esters Proposed a significant new use rule (SNUR) under section 5(a)(2) of the Toxic Substances Control Act for all acrylate esters falling within the definition proposed in this rule (acrylate substances).

November 22, 1993 -- 58 FR 61649
The EPA has concluded certain acrylates may present a risk of cancer. This conclusion is based primarily upon data available for a subset of acrylates which have demonstrated positive results. The NTP toxicology and carcinogenesis study of ethyl acrylate (TR-259) used to support conclusion. 140-88-5
Final Rule Pesticide Tolerances for Dicamba Establishment of a tolerance for the combined residues of the herbicide dicamba and its 5-hydroxy metabolite.

November 24, 1993 -- 58 FR 62039
Negative results of NTP toxicology and carcinogenesis study of dichlorodibenzo-p-dioxin (TR-123) cited. The Agency has concluded that there is no potential carcinogenic risk to humans from a DCDD impurity in the dicamba to be used on cotton. 33857-26-0
Final Rule Chemicals; Toxic Chemical Release Reporting; Community Right-to-Know; Significant New Use Rule Final Rule: Addition of 21 chemicals and 2 chemical categories to the list of toxic chemicals under section 313 of the Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA).

December 1, 1993 -- 58 FR 63500
NTP toxicity study of formic acid (TOX-19) demonstrated sufficient evidence to establish that formic acid can reasonably be anticipated to cause in humans chronic health effects as described in EPCRA section 313(d)(2)(B). 64-18-6
Notice Drinking Water Maximum Contaminant Level Goal; Fluoride Announcement of decision not to revise the maximum contaminant level goal (MCLG) for fluoride after consideration of recent reports concerning the health effects of fluoride.

December 29, 1993 -- 58 FR 68826
NTP toxicology and carcinogenesis study of fluoride (TR-393) cited. Study concluded that there was equivocal evidence in male F344/N rats, and no evidence in female F344/N rats or male or female mice. 7681-49-4
Final Rule Addition of Certain Chemicals; Toxic Chemical Release Reporting; Community Right-to-Know Addition of 313 chemicals and chemical categories to the list of toxic chemicals required to be reported on under section 313 of the Emergency Planning and Community Right-to-Know Act of 1986 and section 6607 of the Pollution Prevention Act of 1990.

January 12, 1994 -- 59 FR 1788
EPA considered chemicals designated as possible, probable, or known carcinogens in the Monographs of IARC and the 6th Annual Report on Carcinogens published by the NTP. Also, used results of the NTP toxicology and carcinogenesis studies of C.I. Acid Red 114 (TR-405), C.I. Direct Blue 218 (TR-430), Chlorendic acid (TR-304), 3-Chloro-2-methyl-1-propene (TR-300), Diglycidyl resorcinol ether, (TR-257), 3,3-Dimethoxybenzidine dihydrochloride (TR-372), 3,3-Dimethylbenzidine dihydrochloride (TR-390), and 5,5-Diphenylhydantoin (phenytoin) (TR-404). 115-28-6
57-41-0
28407-37-6
6459-94-5
101-90-6
563-47-3
20325-40-0
612-82-8
Final Rule Cold, Cough, Allergy, Bronchodilator, and Antiasthmatic Drug Products for Over-the Counter Human Use; Amendment of Final Monograph of OTC Antihistamine Drug Products Establishment of conditions under which over-the-counter antihistamine drug products are generally recognized as safe and effective and not misbranded. Dec. 9, 1992. Amendment of final rule to include doxylamine succinate.

January 28, 1994 -- 59 FR 4216
Data from the NTP toxicology and carcinogenesis study on pyrilamine (TRs 408, 409) was used to determine that pyrilamine maleate is safe for OTC use. The results of an NCTR-toxicology and carcinogenesis study of doxylamine succinate conducted under the auspices of the NTP were used in developing a talk paper concerning the NCTR-findings in animals to inform consumers of these data and the uncertainty of their relevance to humans. 469-21-6
91-84-9
Proposed Rule d_Limonene; Tolerance Exemption Exemption from the requirement of a tolerance be established for residues of d-limonene when used as an inert ingredient in pesticide formulations applied to growing crops or raw agricultural commodities after harvest.

February 23, 1994 -- 59 FR 8581
The NTP toxicology and carcinogenesis study of d-Limonene showed no carcinogenic activity in female rats and mice and in male mice. Clear evidence of kidney-associated carcinogenic activity was noted in male rats. However, the NTP concluded that the male rat kidney carcinogenicity is not predictive of mammalian carcinogenicity. (TR-347) 5989-27-5
Final Rule Dicofol; Revocation of Food Additive Tolerance Revocation of the food additive tolerance for residues of the pesticide dicofol in or on dried tea.

March 9, 1994 -- 59 FR 10993
Data from the NTP toxicology and carcinogenesis study of dicofol (TR-90) showed a statistically significant increase of hepatocellular adenomas and combined hepatocellular adenomas and carcinomas in male mice (B6C3F1) at two doses tested.
115-32-2
Final Rule Fuels and Fuel Additives Registration Regulations Establishment of new requirements for the registration of designated fuels and fuel additives as authorized by sections of the Clean Air Act.

June 27, 1994 -- 59 FR 33042
NTP 13-week inhalation study of N-Hexane in B6C3F1 mice is cited as a reference for the neuropathology assessment. (TOX-02) 110-54-3
Proposed Rule Pesticides; Proposed Rule Revoking Certain Food Regulations Revocation of certain food additive regulations for several pesticides which EPA has determined "induce cancer" within the meaning of the Delaney Clause of section 409 of the Federal Food, Drug and Cosmetic Act.

July 1, 1994 -- 59 FR 33941
NTP toxicology and carcinogenesis study of ethylene oxide (TR-326) is cited as one of the studies used for conclusions that ethylene oxide induces cancer in animals. 75-21-8
Notice Thirty-Fourth Report of the TSCA Interagency Testing Committee to the Administrator: Receipt of Report and Request for Comments Receipt of report of the TSCA Interagency Testing Committee to the Administrator. The ITC revised the Priority Testing List including the removal of eight chemicals from the List.

July 13, 1994 -- 59 FR 35720
The negative results of the NTP toxicology and carcinogenesis study of the structurally-related N-phenyl-2-napththylamine (TR-333) was used by the ITC in developing its rationale for removing N-phenyl-1-napththylamine from the List. 135-88-6
Proposed Rule Drinking Water; National Primary Drinking Water Regulations: Disinfectants and Disinfection Byproducts Includes establishment of maximum residual disinfectant level goals (MRDLGs) for chlorine, chloramines, and chlorine dioxide and maximum contaminant level goals (MCLGs) for bromodichloromethane, dibromochloromethane, and bromoform.

July 29, 1994 -- 59 FR 38668
Data from the NTP toxicology and carcinogenesis studies of bromodichloromethane (TR-321), chlorinated and chloraminated water (TR-392), bromoform (TR-350), and dibromochloromethane (TR-282) were used as part of the evaluation to set maximum residual disinfectant level goals for these substances. 75-25-2
75-27-4
124-48-1
CHLORWATERMX
Proposed Rule Asbestos Worker Protection; Asbestos-Containing Materials in Schools; Proposed Amendment The proposed rule would generally extend the coverage provided under the 1986 OSHA Asbestos Standard for Construction to State and local government employees who are not covered by OSHA- or EPA-approved State plans. It also proposes to extend coverage provided under the OSHA Asbestos Standard for General Industry for automotive brake and clutch repair.

November 1, 1994 -- 59 FR 54746
The EPA classifies asbestos as a Group A carcinogen as cited in the NTP's 7th Annual Report on Carcinogens. (TR-280) (TR-279) (TR-277) (TR-295) 12001-28-4
12172-73-5
14567-73-8
12001-29-5
Final Rule Addition of Certain Chemicals; Toxic Chemical Release Reporting; Community Right-to-Know EPA is taking this action pursuant to its authority to add to the list those chemicals and chemical categories that meet the EPCRA section 313(d)(2) criteria for addition to the list of toxic chemicals.

November 30, 1994 -- 59 FR 61432
Long-chain chlorinated paraffins have not been classified as "probable human carcinogens" by NTP or IARC and the NTP bioassay (TR-305) showed insufficient evidence. Therefore the EPA concludes that there is insufficient evidence to list long-chain chlorinated paraffins on the EPCRA section 313 list. 108171-27-3
Proposed Rule Acephate, Triadimefon, Iprodione, and Imazalil; Revocation of Food Additive Regulations EPA is proposing to revoke food additive regulations for five pesticides which EPA has determined "induce cancer" within the meaning of the Delaney clause of section 409 of the Federal Food, Drug and Cosmetic Act (FFDCA). After a full evaluation of all the data and supporting information regarding animal carcinogenicity, the EPA has concluded that exposure to triadimefon results in the induction of hepatocellular adenomas in NMRI mice. Hepatocellular adenomas are considered to be evidence of cancer because hepatocellular adenomas can progress to hepatocellular carcinomas.

January 18, 1995 -- 60 FR 3607
EPA supports its conclusion that hepatocellular adenomas can progress to hepatocellular carcinomas with NTP's rationale for combining tumor types for an overall analysis of carcinogenicity (in addition to analyzing them separately). N/A
Final Rule Food and Feed Additive Regulations for d-Limonene, Dihydro-5-Pentyl-2(3H)-Furanone, and Dihydro-5-Heptyl-2(3H)-Furanone EPA proposes to establish food/feed additive regulations for residues of the insecticide d-limonene when used as an active ingredient in insect-repellent tablecloths and in insect repellent strips used in food/feed-handling establishments.

February 8, 1995 -- 60 FR 7511
Data on the oral toxicity of d-limonene was summarized in the NTP 2-year bioassay and comprehensive literature review. TR-347 5989-27-5
Proposed Rule Test Rule; Office of Water Chemicals Proposed Withdrawal of Certain Testing Requirements The EPA is proposing to withdraw certain testing requirements for two chemical substances listed in the Office of Water chemicals test rule. This proposal includes the withdrawal of the 90-day subchronic testing requirements for 1,1,2,2-tetrachloroethane.

April 10, 1995 -- 60 FR 18079
The NTP's 90-day subchronic toxicity drinking water study of 1,1,2,2-tetrachloroethane meets the 90-day subchronic toxicity test required under the test rule and can be used to establish long-term Health Advisories for the Office of Water. (TOX-45) 79-34-5
Other Monosodium Methanearsonate and Disodium Methanearsonate: Toxic Chemical Release Reporting; Community Right-to-Know EPA is denying a petition to delist monosodium methanearsonate and disodium methanearsonate from the reporting requirements under section 313 of the Emergency Planning and Community Right-to-Know Act of 1986.

April 20, 1995 -- 60 FR 19702
The EPA and the NTP have classified inorganic arsenicals, including arsenate, as known human carcinogens. (NTP 7th Annual Report on Carcinogens) N/A
Final Rule Diflubenzuron: Pesticide Tolerances The EPA established tolerances for residues of the insecticide diflubenzuron in or on raw agricultural commodities. Para-chloroaniline (PCA) is a metabolite of diflubenzuron.

May 10, 1995 -- 60 FR 24785
Information from the NTP bioassay on PCA was used to help establish maximum permissible levels (TR-351). 20265-96-7
Final Rule Reportable Quantity Adjustments The EPA has taken final action on reportable quantities (RQs) for hazardous substances under the Comprehensive Environmental Response, Compensation, and Liability Act. The person in charge of a facility or vessel from which a hazardous substance is released in excess of its RQs must notify appropriate authorities, who can then evaluate whether a response is needed.

June 12, 1995 -- 60 FR 30926
The Agency has promulgated a final RQ of 100 pounds (as proposed) based on chronic toxicity. Because no chronic toxicity studies have been reported for diethanolamine, both EPA and commenters used data from a NTP 13-week subchronic study (TOX-20) to develop their respective conclusions. 111-42-2
Proposed Rule Food Additives Permitted for Direct Addition to Food for Human Consumption; Acesulfame Potassium The EPA proposes to establish a tolerance for residues of the insecticide dimethoate in or on the raw agricultural commodities blueberries and asparagus (see Federal Register July 5, 1995, p. 34945)

June 23, 1995 -- 60 FR 32640
The NTP has concluded that dimethoate is a "mutagenic" compound based on its testing for gene mutation and chromosomal aberrations. 60-51-5
Proposed Proposal to delist di-(2-ethylhexyl) adipate from the reporting requirements under section 313 of the Emergency Planning and Community Right-to-Know Act of 1986 and section 6607 of the Pollution Prevention Act of1990

August 1, 1995 -- 60 FR 39132
As part of the relevant data, EPA used results of the NTP bioassay to conclude that, overall, the evidence is too limited to establish that di-(2-ethylhexyl) adipate is likely to cause cancer. TR 212. 103-23-1
Notice Thirty-Sixth Report of the TSCA ITC; Revision of Priority Testing List The ITC is revising its Priority Testing List including the removal of butyraldehyde; sulfonyl bis(4-chlorobenzene); 2-propenoic acid,2-cyanoethyl ester; and dipropylene glycol from the List as a result of NTP testing.

August 17, 1995 -- 60 FR 42981
The NTP has sponsored a reproductive screening test of butyraldehyde; has developed most of the screening test data and will be conducting health effects testing for sulfonyl bis(4-chlorobenzene); is currently testing a dipropylene glycol mixture; and is evaluating the practical problems which may prevent effective health effects testing of ethyl cyanoacrylate. 123-72-8
25265-71-8
80-07-9
7085-85-0
Final Rule Benzidine-Based Chemical Substances; Proposed Significant New Uses of Certain Chemical Substances The EPA is proposing a significant new use rule under section 5(a)(2) of TSCA which would require persons to notify EPA at least 90 days before commencing the manufacture, import, or processing of benzidine-based chemical substances. The EPA believes that benzidine-based chemical substances may be hazardous to human health and that the proposed rule will protect against potentially adverse exposure.

August 30, 1995 -- 60 FR 45119
EPA supported, in part, their conclusion about the potential hazard of benzidine-based chemical substances on the results of three benzidine-based dye rodent studies reported by the NTP. TR-108. 16071-86-6
2602-46-2
1937-37-7
Proposed Rule Diethyl Phthalate; Toxic Chemical Release Reporting: Community Right-to-Know EPA is proposing to delete diethyl phthalate (DEP) from the list of chemicals subject to reporting requirements under section 313 of the Emergency Planning and Community Right-to-Know Act of 1986 and section 6607 of the Pollution Prevention Act of 1990.

September 5, 1995 -- 60 FR 46076
As part of the relevant data, EPA used results of the NTP dermal bioassay to conclude that there is insufficient evidence to establish that DEP is likely to cause cancer. TR-429. 84-66-2
Notice Dichlorvos; Notice of Preliminary Determination to Cancel Certain Registrations and Draft Notice of Intent to Cancel EPA's issued this Notice to inform the public that the Agency has, after reviewing additional study date, reassessed the potential adverse effects and the benefits associated with the use of pesticide products containing dichlorvos. The Agency has preliminarily determined that, unless the terms and conditions of registration are modified as proposed in this Notice, the risks from the use of dichlorvos outweigh the benefits of their continued use.

September 28, 1995 -- 60 FR 50337
As part of the relevant data, the EPA has classified dichlorvos as a Group C (possible human) carcinogen based on the results of the NTP bioassay (TR-342) and on the conclusions of a special NTP Panel of Experts convened April 1988 to further assess the incidence of pancreatic lesions observed in the 2-year rat studies. 62-73-7
Proposed Rule Dichlorvos; Notice of Preliminary Determination to Cancel Certain Registrations and Draft Notice of Intent to Cancel EPA proposes to establish a tolerance for residues of the insecticide diflubenzuron in or on the raw agricultural commodity artichokes at 6.0 ppm. Para-chloroaniline (PCA) is a metabolite of diflubenzuron.

April 17, 1996 -- 61 FR 16745
The EPA's Health Effects Division Peer Review Committee classified PCA as a Group B2 carcinogen (probable human carcinogen) based on the results of the NTP chronic study of p-chloroaniline hydrochloride (TR-351). 20265-96-7
Notice Dichlorvos; Notice of Preliminary Determination to Cancel Certain Registrations and Draft Notice of Intent to Cancel The EPA announced the publication of the new "Proposed Guidelines for Carcinogen Risk Assessment" which replaces the 1986 guidelines.

April 23, 1996 -- 61 FR 17960
Default assumptions are recognized as necessary in risk assessment ( National Research Council report) and the EPA has incorporated into its risk assessment guidelines default assumptions in part using inferences based on general scientific knowledge. The studies and experience of the NTP are cited and referred to throughout this Federal Register notice as part of the scientific knowledge used by the EPA to develop their defaults and how they plan their assessment of evidence of toxicity. N/A
Proposed Rule Dichlorvos; Notice of Preliminary Determination to Cancel Certain Registrations and Draft Notice of Intent to Cancel EPA proposes to establish a pesticide tolerance for residues of the insecticidal fluorine compounds cryolite and or synthetic cryolite. Fluoride has been identified as the residue of toxicological concern in cryolite and synthetic cryolite.

May 8, 1996 -- 61 FR 20781
The NTP chronic study of sodium fluoride (TR-393) was cited as an example of toxicological data considered in the support of the proposed tolerance and regulation. 7681-49-4
Proposed Rule Food Additives Permitted for Direct Addition to Food for Human Consumption: Olestra EPA is proposing a test rule under section 4(a) of the Toxic Substances Control Act to require manufacturers and processors of 21 hazardous air pollutants (HAPs) to test these substances for certain health effects.

June 26, 1996 -- 61 FR 33178
As part of the process to select which study data were needed for these HAPs, EPA reviewed the NTP's database of ongoing testing to locate unpublished studies. N/A
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption: Olestra The EPA is promulgating a new use rule which requires persons to notify the EPA at least 90 days before commencing the manufacture, import, or processing of certain (22) benzidine-based chemical substances for significant new use as described in this rule.

October 7, 1996 -- 61 FR 52287
As part of the basis for this significant new use rule, EPA noted that NIOSH and NCI jointly recommended that three benzidine-based dyes, Direct Black 38, Direct Blue 6, and Direct Brown 95, be handled in the workplace as if they were human carcinogens. This recommendation was based on testing data including the NTP/NCI bioassay which confirmed that these dyes cause cancer in rodents. (TR-108) 16071-86-6
2602-46-2
1937-37-7
Notice Guidelines for Reproduction Toxicity Risk Assessment Notice: The EPA has made available the final Guidelines for Reproductive Toxicity Risk Assessment. The Guidelines include protocols designed to determine the potential of a test substance to produce reproductive toxicity in laboratory animals.

October 31, 1996 -- 61 FR 56274
NTP Work Cited: An NTP continuous breeding protocol, Fertility Assessment by Continuous Breeding, is cited as an example of alternative reproductive tests which the EPA considered in developing the Guidelines. N/A
Proposed Rule Supplement to California State Plan; Approval EPA is denying a petition to remove the barium compounds category from the list of chemicals subject to reporting requirements under the Community Right-to-Know Act and the Pollution Prevention Act. The EPA concluded that barium ion can become available from the barium compounds subject to the reporting, and that barium ion can reasonably be anticipated to cause chronic toxicity.

January 3, 1997 -- 62 FR 366
The EPA's toxicological evaluation of barium compounds included review of data from the NTP's Drinking Water Toxicity/Carcinogenicity Studies of Barium Chloride Dihydrate (TR-432). 10326-27-9
Final Rule Indirect Food Additives: Adhesives and Components of Coatings; Adjuvants, Production Aids and Sanitizers Final Rule: The FDA is amending the food additive regulations to provide for the safe use of 2,2-ethylidenebis(4,6-di-tert-butylphenyl)fluorophosphonite as an antioxidant in adhesives and in the preparation of polymers intended for contact with food. Although the additive itself has not been shown to cause cancer, it has been found to contain minute amounts of methylene chloride, which is a carcinogenic impurity resulting from the manufacture of the additive.

January 15, 1997 -- 62 FR 2011
The FDA used data from the NTP Inhalation Bioassay on Methylene Chloride, TR-306, to estimate the upper-bound limit of lifetime human risk from exposure resulting from the proposed use of this additive. And, based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to methylene chloride would result from the proposed use of the additive. 75-09-2
Proposed Rule Addition of Dioxin and Dioxin-Like Compounds; Modification of Polychlorinated Biphenyls Listing; Toxic Chemical Release Reporting; Community Right-to-Know The EPA is proposing to add a chemical category that includes dioxin and 27 dioxin-like compounds to the list of toxic chemicals subject to the reporting requirements under EPCRA.

May 7, 1997 -- 62 FR 24887
As part of the basis for this proposed rule, the EPA noted that the NTP bioassays of 1,2,3,6,7,8- and 1,2,3,7,8,9-hexachlorodibenzo-p-dioxin (TR-198) showed that these compounds are carcinogenic. The EPA also noted that the NTP's Annual Report on Carcinogens listed PCBs as substances which may reasonably be anticipated to be human carcinogens. N/A
Notice Announcement of the Drinking Water Contaminant Candidate List The Safe Drinking Water Act (SDWA) requires the EPA to publish a list of contaminants that are known or anticipated to occur in public water systems and which may require regulation under the SDWA. The EPA has reviewed and considered public comments of the draft CCL in creating the final CCL.

March 2, 1998 -- 63 FR 10274
As part of its evaluation of the risk associated with methyl bromide's contamination of drinking water, the EPA cited the results of the NTP 2-year inhalation study (TR-385). 74-83-9
Final Rule Organobromine Production Wastes; Identification and Listing of Hazardous Waste; Land Disposal Restrictions; Listing of CERCLA Hazardous Substances, Reportable Quantities EPA is adding tribromophenol and wastes generated from its production to its list of CERCLA hazardous substances. EPA used structure activity relationship (SAR) analysis information in support of its listing of tribromophenol.

May 4, 1998 -- 63 FR 24596
NTP mutagenicity studies are cited to show that a negative in Salmonella does not necessarily predict that 2,4,6-trichlorophenol is not a carcinogen. As part of its validation of the use of SAR analysis for identifying hazardous wastes, EPA cited a comparison of the NTP bioassay of 1,2-dibromoethane (TR-210) with the NCI bioassay of 1,2-dichloroethane (TR-55). The study results showed that carcinogenic activity was retained with the substitution of a chlorine by a bromine.
88-06-2
106-93-4
107-06-2
Final Rule Diflubenzuron; Temporary Pesticide Tolerance This regulation establishes a temporary tolerance for residues of the insecticide diflubenzuron and metabolites convertible to p-chloroaniline (PCA) expressed as diflubenzuron on rice grain at 0.01 ppm.

May 13, 1998 -- 63 FR 26481
PCA was classified as a Group B2 carcinogen (probable human carcinogen). The classification for PCA was based on the results of the NTP bioassay on p-chloroaniline hydrochloride (TR-351). The results of several NTP mutagenicity studies on PCA discussed in the bioassay report were also cited. 20265-96-7
Notice Update on the Status of the Superfund Substance-Specific Applied Research Program This Notice provides the status of ATSDR's Superfund mandated Substance-Specific Applied Research Program (SSARP). To date, 188 priority data needs have been identified for the 50 priority hazardous substances frequently found at waste sites.

January 15, 1999 -- 64 FR 2759
The ATSDR maintains an interagency agreement (IAG) with NTP to conduct toxicologic testing of substances identified at National Priority List sites.  Under this agreement, the NTP filled the toxicity priority data need for the immunotoxicology study of carbon tetrachloride.  The NTP is currently addressing reproductive toxicity data needs for chlordane, endrin, and heptachor; the bioavailability of PCB's in soil; and dose-response data for di-n-butyl phthalate. N/A
Notice Acetonitrile: Community Right-to-Know Toxic Chemical Release Reporting The EPA is denying a petition to remove acetonitrile from the list of chemicals subject to the reporting requirements under section 313 of the Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA) and section 6607 of the Pollution Prevention Act of 1990 (PPA).

March 5, 1999 -- 64 FR 10597
EPA reviewed all of the available data, including the NTP Technical Report of the Toxicology and Carcinogenesis of Acetonitrile (TR-447), to conclude that acetonitrile can reasonably be anticipated to cause serious or irreversible chronic health effects in humans, including neurotoxicity and death. 75-05-8
Final Rule Diflubenzuron; Pesticide Tolerances The EPA established tolerances for residues of the insecticide diflubenzuron and its metabolites 4-chlorophenylurea and 4-chloroaniline in/on rice grain at 0.02 ppm and rice straw at 0.8 ppm.

April 19, 1999 -- 64 FR 19050
The 4-chloroaniline (PCA) metabolite was classified as a Group B2 carcinogen (probable human carcinogen) based on the results of the NTP bioassay on PCA (TR-351). The NTP bioassay and the results of several NTP mutagenicity studies on PCA discussed in the bioassay report were part of the information used to estimate dietary risk assessments. 20265-96-7
Final Rule 1,3-Dichloropropene: Proposed Determination to Terminate Special Review The EPA proposed to terminate the Special Review of 1,3-Dichloropropene (1,3-D). The EPA has determined that the benefits associated with the continued use of 1,3-D under the recently revised terms and conditions of 1,3-D's reregistration outweigh the risks.

January 12, 2000 -- 65 FR 1869
The EPA classified 1,3-D as a probable, human carcinogen based on the review of data from carcinogenicity studies including the NTP Toxicology and Carcinogenesis Studies of Telone II (TR-269). 542-75-6
Final Rule Notice of Filing a Pesticide Petition to Establish a Tolerance for Certain Pesticide Chemicals in or on Food. The FDA is amending the food additive regulations to provide for the safe use of ethylene-norbornene copolymers as articles or components of articles in contact with dry food. Although the additive itself has not been shown to cause cancer, it has been found to contain minute amounts of benzene, a carcinogenic impurity resulting from the manufacture of the additive.

January 21, 2000 -- 65 FR 3384
The FDA used data from the NTP Carcinogenicity Study of Benzene (TR-289), to estimate the upper-bound limit of lifetime human risk from exposure resulting from the use of the additive. And based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to benzene would result from the proposed use of the additive. 71-43-2
Notice Diflubenzuron; Pesticide Tolerances The EPA has received a pesticide petition for establishing a tolerance for residues of diflubenzuron in or on the raw agricultural commodity rangeland grass at 6.0 ppm. P-Chloroaniline (PCA) is a metabolite of diflubenzuron.

April 5, 2000 -- 65 FR 17872
Information from the NTP bioassay of p-Chloroaniline Hydrochloride, TR-351, was used to determine that the dietary risk from diflubenzuron-derived PCA is below EPA's level of concern. 20265-96-7
Final Rule Vinclozolin; Pesticide Tolerances The EPA has established tolerances for combined residues of vinclozolin and its metabolites containing the 3,5-dichloroaniline moiety in or on specific raw agricultural commodities.

July 18, 2000 -- 65 FR 44453
The EPA used data from the NTP's p-Chloroaniline bioassay (TR-351) to help assess the carcinogenicity for structurally related chloroanilines. 20265-96-7
Final Rule Lead and Lead Compounds: Lowering of Reporting Thresholds The EPA is lowering the reporting thresholds for lead and lead compounds which are subject to reporting under section 313 of the Emergency Planning and Community Right-to-Know Act and section 6607 of the Pollution Prevention Act.

January 17, 2001 -- 66 FR 4500
Commenters contended that the Persistent Bioaccumulative Toxic Chemicals (PBT) rule framework was designed only for organic substances and is being incorrectly applied to metals. The EPA disagreed citing, as an example, the NTP's criteria for characterizing chemical carcinogens is the same for organic as well as inorganic substances to support its position that it is scientifically valid to establish generic criteria that are applicable to all substances. (8th Report on Carcinogens) N/A
Final Rule Control of Air Pollution from New Motor Vehicles: Heavy-Duty Engine and Vehicle Standards and Highway Diesel Fuel Sulfur Control Requirements. The EPA is setting new diesel exhaust emission standards for heavy-duty highway engines to protect the public's health. Health studies indicate potential hazards that appear to be related to acute and chronic exposure.

January 18, 2001 -- 66 FR 5002
The EPA cited the NTP as an example of a governmental agency that has identified diesel exhaust particles as reasonably anticipated to be a human carcinogen.(Ninth Report on Carcinogens). N/A
Final Rule National Advisory Committee for Acute Exposure Guidelines Levels (AEGLs) for Hazardous Substances; Proposed AEGL Values. The EPA is proposing AEGLs for 18 chemicals to provide Federal, State, and local agencies with threshold short-term exposure limits for the public to hazardous, airborne chemicals.

May 2, 2001 -- 66 FR 21940
The EPA used data from the NTP Toxicology and Carcinogenesis Studies of Tetrachloroethylene (TR-311) and Tetranitromethane (TR-386) in determining the proposed AEGL values for these two chemicals. 509-14-8
127-18-4
Final Rule International Conference on Harmonisation; Draft Recommendations for the Revision of the Permitted Daily Exposures for Two Solvents,N-Methylpyrrolidone and Tetrahydrofuran. The EPA established tolerances for combined residues of the insecticide diflubenzuron and its metabolites 4-chlorophenylurea and 4-chloroaniline (PCA) in or on pear.

February 15, 2002 -- 67 FR 7085
Information from the NTP bioassay of p-Chloroaniline Hydrochloride, TR-351, was used to establish the tolerance of diflubenzuron and its metabolites 4-chlorophenylurea and 4-chloroaniline at .50 ppm in or on pears. 20265-96-7
Notice International Conference on Harmonisation; Draft Recommendations for the Revision of the Permitted Daily Exposures for Two Solvents,N-Methylpyrrolidone and Tetrahydrofuran. The EPA is proposing AEGLs for 8 chemicals to provide Federal, State, and local agencies with threshold short-term exposure to hazardous airborne chemicals.

February 15, 2002 -- 67 FR 7164
The EPA used data from the NTP Toxicology and Carcinogenesis Studies of Propylene Oxide (TR-267) in determining the proposed AEGL values for propylene oxide. 75-56-9
Final Rule Indirect Food Additives: Polymers EPA intends to reclassify eight inert ingredients from List 2, Potentially Toxic Inerts/High Priority for Testing to List 1 Inerts of Toxicological Concern. One of the criteria for being considered a List 1 inert ingredient is to be characterized by the NTP as an animal carcinogen in at least one species and sex.

March 8, 2002 -- 67 FR 10718
The EPA used data from the NTP Toxicology and Carcinogenesis Studies of 2-Benzyl-4-chlorophenol (TR-424), 2-Butoxyethanol (TR-484), Butyl benzyl Phthalate (TRs 213 & 458), Diethanolamine (TR-478), Ethylbenzene (TR-466), 1,2-Epoxybutane (TR-329), 2-Mercaptobenzothiazole (TR-332), and Nitromethane (TR-461) to support its reclassification of these inert ingredients to List 1. (TR-444) 100-41-4
106-88-7
149-30-4
120-32-1
85-68-7
111-42-2
75-52-5
111-76-2
Notice Indirect Food Additives: Polymers The EPA is soliciting public comment on whether a preliminary determination that nine contaminants do not meet all three Safe Drinking Water Act requirements is appropriate, and thus no National Primary Drinking Water Regulations (NPDWR) should be considered for these contaminants.

June 3, 2002 -- 67 FR 38222
The EPA used data from the NTP Toxicity Studies of Hexachloro-1,3-butadiene, (TOX- 1) and Naphthalene (TR-410) & (TR-500) in determining that NPDWRs should not be considered for these contaminants. 91-20-3
87-68-3
Notice Sucrose Octanoate Esters; Exemption from the Requirement of a Tolerance The EPA has established an exemption from the tolerance requirements pursuant to FFDCA 408(c) and 9(d) for residues of certain Sucrose Octanoate Esters (SOEs) in or on all food commodities when applied/used in accordance with good agricultural practices.

September 25, 2002 -- 67 FR 60146
The EPA has determined, based on available toxicology data including data from an NTP genetic toxicology study, that no harm will result from aggregate exposure of residues of SOEs to the U.S. population. 124-07-2
Notice National Primary Drinking Water Regulations: Stage 2 Disinfectants and Disinfection Byproducts Rule The EPA is proposing maximum contaminant level goals (MCLGs) for chloroform, monochloroacetic acid and trichloroacetic acid;National Primary Drinking Water Regulations for total trihalomethanes and haloacetic acids; and revisions to the reduced monitoring requirements for bromates.

August 18, 2003 -- 68 FR 49548
The EPA used data from the NTP Toxicology and Carcinogenesis Studies of Bromodichloromethane (TR-321), Tribromomethane (TR-350), and Monochloroacetic Acid (TR-396) in determining the MCLGs for water disinfection byproducts. 79-11-8
75-25-2
75-27-4
Proposed List of Hazardous Air Pollutants, Petition Process, Lesser Quantity Designations, Source Category List The EPA proposes to amend the list of hazardous air pollutants contained in section 112(b)(1) of the Clean Air Act by removing ethylene glycol monobutyl ether from the group of glycol ethers.

November 21, 2003 -- 68 FR 65648
The EPA used data from the NTP's 2-year inhalation study (TR-484) in considering the removal of EGBE from the list of hazardous air pollutants.
111-76-2
Notice Fifty-Third Report of the TSCA Interagency Testing Committee to the Administrator of the Environmental Protection Agency; Receipt of Report and Request for Comments The Toxic Substances Control Act (TSCA) Interagency Testing Committee (ITC) transmitted its Fifty-Third Report to the Administrator of the EPA on December 2, 2003 revising the Priority Testing List by adding 3 pyridinamines and 20 tungsten compounds requesting that EPA add the 3 pyridinamines and 20 tungsten compounds to the TSCA section 8(a) Preliminary Assessment Information Reporting (PAIR) rule and soliciting voluntary use, exposure, and effects information for 3 pyridinamines, 20 tungsten compounds, and 43 vanadium compounds through its Voluntary Information Submissions Innovative Online Network.

January 15, 2004 -- 69 FR 2468
Tungsten was nominated for toxicology and carcinogenicity studies to the National Toxicology Program by the Centers for Disease Control and Prevention's National Center for Environmental Health based on recent data showing elevated tungsten body burdens in residents of Fallon, NV, and the limited data available to assess the potential long-term adverse health effects of tungsten exposure. Further information is needed to more fully evaluate human and environmental exposures and health effects. 1314-35-8
Proposed National Emission Standards for Hazardous Air Pollutants: Proposed Standards for Hazardous Air Pollutants for Hazardous Waste Combustors The EPA proposes national emission standards for hazardous air pollutants (HAPs) for hazardous waste combustors (HWCs). These proposed standards will, when final, implement section 112(d) of the Clean Air Act by requiring HWCs to meet HAP emission standards reflecting the application of the maximum achievable control technology.

April 20, 2004 -- 69 FR 21198
Nickel has been identified as a HAP emitted from HWCs. The EPA used data from the NTP inhalation studies of Nickel (II) Oxide (TR 451) and Nickel Sulfate Hexahydrate (TR 454) in identifying risks associated with exposure to nickel. The 2001 DHHS National Toxicology Program 9th Report on Carcinogens classified 2,3,7,8-TCDD as a known human carcinogen.
1313-99-1
10101-97-0
1746-01-6
Proposed National Emission Standards for Hazardous Air Pollutants: Proposed Standards for Hazardous Air Pollutants for Hazardous Waste Combustors (Phase I Final Replacement Standards and Phase II) This action proposes national emission standards for hazardous air pollutants for hazardous waste combustors including hazardous waste burning incinerators, cement kilns, lightweight aggregate kilns, industrial/commercial/ institutional boilers and process heaters, and hydrochloric acid production furnaces that EPA has identified as major sources of hazardous air pollutant emissions. Proposed standards will implement section 112(d) of the Clean Air Act (CAA) by requiring hazardous waste combustors to meet emission standards.

April 20, 2004 -- 69 FR 21197
In 2001 the DHHS National Toxicology Program classified 2,3,7,8-TCDD as a know human carcinogen in it's 9th Report on Carcinogens.

A pair of inhalation studies (TR-453 and TR-454) performed under the auspices of the National Toxicology Program (NTP) of the National Institutes of Health concluded that there was no evidence of carcinogenic activity of soluble nickel salts in rats or mice and that there was some evidence of carcinogenic activity of nickel oxide (TR-451) in male and female rats based on increased incidence of alveolar/bronchiolar adenoma or carcinoma and increased incidence of benign or malignant pheochromocytoma (a tumor of the adrenal gland) and equivocal evidence in mice based on marginally increased incidence of alveolar/bronchiolar adenoma or carcinoma in females and no evidence in males.

In December 2006, the Tenth Annual Report on Carcinogens classifies nickel compounds as "known to be human carcinogens".
10101-97-0; 12035-72-2; 1313-99-1; 1746-01-6
Final Rule National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters The EPA is promulgating national emission standards for hazardous air pollutants for industrial, commercial, and institutional boilers and process heaters and has identified industrial, commercial, and institutional boilers and process heaters as major sources of hazardous air pollutants.

September 13, 2004 -- 69 FR 55217
A NTP study (TR-392) showed no evidence of carcinogenic activity in male rats or male and female mice, and equivocal evidence in female rats, from ingestion of chlorinated water. The EPA has not classified chlorine for potential carcinogenicity. 7782-50-5; 7681-52-9
Final Rule List of Hazardous Air Pollutants, Petition Process, Lesser Quantity Designations, Source Category List; Petition To Delist of Ethylene Glycol Monobutyl Ether The EPA is amending the list of hazardous air pollutants contained in section 112(b)(1) of the Clean Air Act by removing the compound ethylene glycol monobutyl ether (EGBE) (2-Butoxyethanol)(CAS No. 111-76-2) from the group of glycol ethers.

November 29, 2004 -- 69 FR 69320
In the preamble to the proposed rule, we stated that the Agency believes EGBE is not genotoxic and that two distinctly different nonlinear modes of action are principally responsible for the increased forestomach and liver tumors reported by NTP (TR-494). 111-76-2
Notice Isophorone; Notice of Filing a Pesticide Petition to Establish a Tolerance for a Certain Pesticide Chemical in or on Food This notice announces the initial filing of a pesticide petition proposing the establishment of regulations for residues of a certain pesticide chemical in or on various food commodities.

April 27, 2005 -- 70 FR 21767
In an oral gavage chronic toxicity/oncogenicity study conducted by the National Toxicology Program at dose levels of 0, 250 and 500 mg/kg/day in F344 rats and B6C3F1 mice, there was some evidence of carcinogenicity of isophorone in male rats (kidney tumors, preputial gland carcinomas). (TR-291) 78-59-1
Final Rule Pinene Polymers; Exemption from the Requirement of a Tolerance This regulation establishes exemptions from the requirement of a tolerance for residues of several alpha and/or beta-pinene polymers when used as inert ingredients in or on growing crops and when applied to raw agricultural commodities after harvest. Hercules, Inc. submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of alpha and/or beta-pinene polymers.

May 18, 2005 -- 70 FR 28447
The data considered in this assessment included information submitted by the petitioner, and information located by OPP on the internet, primarily information prepared by the National Toxicology Program (NTP) and the robust summaries for bicyclic terpene hydrocarbons submitted in 2002 to EPA by the Terpene Consortium of the Flavor and Fragrance High Production Volume Consortia (FFHPVC). N/A
Final Rule List of Hazardous Air Pollutants, Petition Process, Lesser Quantity Designations, Source Category List EPA is amending the list of hazardous air pollutants contained in section 112 of the Clean Air Act by removing the compound methyl ethyl ketone (MEK) (2-Butanone) (CAS No. 78-93-3). This action is being taken in response to a petition submitted by the Ketones Panel of the American Chemistry Council (formerly the Chemical Manufacturers Association) on behalf of MEK producers and consumers to delete MEK from the HAP list. Petitions to remove a substance from the HAP list are permitted under section 112 of the CAA.

December 19, 2005 -- 70 FR 75047
There is an absence of positive results in the majority of mutagenicity and genotoxicity tests which are designed to indicate the potential for carcinogenicity. Methyl ethyl ketone has been tested for activity in an extensive spectrum of in vitro and in vivo genotoxicity assays and has shown no evidence of genotoxicity in most conventional assays (National Toxicology Program, no date; World Health Organization 1992; Zeiger et al., 1992).

While developing the final rule, EPA learned that preliminary results of a recent cancer bioassay by the National Toxicology Program suggested that methyl isobutyl ketone (MIBK) appears to be a weak or marginally active carcinogen in rats and mice, possibly by a nongenotoxic mode of action. (TR-538)
78-93-3 and 108-10-1
Proposed National Perchloroethylene Air Emission Standards for Dry Cleaning Facilities EPA is proposing revised standards to limit emissions of perchloroethylene (PCE) from existing and new dry cleaning facilities.

December 21, 2005 -- 70 FR 75884
NTP technical report on the toxicology and carcinogenesis of tetrachloroethylene (perchloroethylene) (CAS No. 127-18-4) in F344/N rats and B6C3F1 mice (inhalation studies) National Toxicology Program, Research Triangle Park, NC. (TR-311), NIH Publication No. 86-2567. August 1986. 127-18-4
Final Rule National Primary Drinking Water Regulations: Stage 2 Disinfectants and Disinfection Byproducts Rule The Environmental Protection Agency (EPA) is promulgating today's final rule, the Stage 2 Disinfectants and Disinfection Byproducts Rule (DBPR), to provide for increased protection against the potential risks for cancer and reproductive and developmental health effects associated with disinfection byproducts (DBPs).

January 4, 2006 -- 71 FR 388
Two-year bioassays by the National Toxicology Program (NTP) released in abstract form have recently been completed on BDCM and chlorate. The draft abstract on BDCM reported no evidence of carcinogenicity when BDCM was administered via drinking water (NTP 2005a). Another recent study, a modified two-year bioassay on BDCM in the drinking water, reported little evidence of carcinogenicity (George et al. 2002). In a previous NTP study, tumors were observed, including an increased incidence of kidney, liver, and colon tumors, when BDCM was administered at higher doses by gavage in corn oil (NTP 1987). EPA will examine new information on BDCM as it becomes available. In the chlorate draft abstract, NTP found some evidence that it may be a carcinogen (NTP 2004). Chlorate is a byproduct of hypochlorite and chlorine dioxide systems. A long-term, two-year bioassay NTP study on DBA is also complete but has not yet undergone peer review (NTP 2005b). (TR-321) (TR-532) (GMM-5) (TR-517) (TR-537) 75-27-4
7775-09-9
and 631-64-1
Proposed Ethylenediaminetetraacetic Acid Chemicals: Exemptions from the Requirement of a Tolerance The Agency is proposing to establish 16 new and amend three existing exemptions from the requirement of a tolerance for residues of various ethylenediaminetetraacetic acid (EDTA) chemicals in or on raw agricultural commodities when used as inert ingredients in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA). This regulation eliminates the need to establish a maximum permissible level for residues of these EDTA chemicals.

March 8, 2006 -- 71 FR 11563
The toxicological profile data considered in this assessment included information located by the Office of Pesticide Programs on the internet, studies conducted by the National Toxicology Program (NTP) and the National Cancer Institute (NCI), several work products produced by the Cosmetic Ingredient Review, several evaluations by the World Health Organization, and articles from open literature.

Based on the available toxicity data on ethylenediaminetetraacetic acid (EDTA) and its various salts, with particular emphasis on the comparison of the findings in the two developmental toxicity studies; the reviews and evaluations conducted by NTP, NCI, and WHO; the knowledge that trace metal supplementation occurs via the food and drinking water consumed by human beings; and considering the estimated exposures of the wide-spread existing uses of ethylenediaminetetraacetic acid (EDTA) and its various salts which are less than levels at which adverse effects were noted, EPA concludes that there is a reasonable certainty of no harm from aggregate exposure to residues of ethylenediaminetetraacetic acid (EDTA) and its various salts. (TR-11)

150-38-9
Final Rule Testing of Certain High Production Volume Chemicals EPA is promulgating a final rule under the Toxic Substances Control Act that requires manufacturers (including importers) and processors of 17 high production volume chemicals to conduct acute toxicity, repeat dose toxicity, developmental and reproductive toxicity, genetic toxicity (gene mutations and chromosomal aberrations), ecotoxicity (in fish, Daphnia, and algae), and environmental fate (including 5 tests for physical chemical properties and biodegradation) testing.

March 16, 2006 -- 71 FR 13708
With one exception, the "Class 1" chemical substances listed in Table 2 in § 799.5085(j) of the regulatory text (i.e., 12 of the 17 chemical substances included in this final rule) must be tested at a purity of at least 99%. The exception is 1,3-propanediol, 2,2-bis[(nitrooxy)methyl]-,dinitrate (ester) also known as pentaerythritol tetranitrate (PETN), which cannot be tested at 99% purity because of its explosive properties and must either be diluted in water or tested in a mixture with an appropriate stabilizing compound (e.g., D-lactose monohydrate is the stabilizer in PETN, NF which is a mixture that is 20% by weight PETN and 80% by weight Dlactose monohydrate). PETN, NF is the form of PETN which was tested by NTP in several toxicity studies.

U.S. Department of Health and Human Services. National Institutes of Health. NTP. Toxicology and carcinogenesis studies of pentaerythritol tetranitrate in F344/N rats and B6C3F1 mice (feed studies). (TR-365)
78-11-5
Final Rule Ethylene Oxide Emissions Standards for Sterilization Facilities This action finalizes our decision not to revise the Ethylene Oxide Emission Standards for Sterilization Facilities, originally promulgated on December 6, 1994. Within 8 years of promulgating these standards, the Clean Air Act directs us to assess the risk and to promulgate more stringent standards if necessary to protect public health with an ample margin of safety and to prevent adverse environmental effects. Also, within 8 years of promulgating the national emission standards, the Clean Air Act requires us to review and revise the standards as necessary, taking into account developments in practices, processes, and control technologies. Today¿s action reflects our findings that after conducting these risk and technology reviews, no additional control requirements are warranted.

April 7, 2006 -- 71 FR 17712
In 1994, the International Agency for Research on Cancer categorized ethylene oxide in their Group 1 (Carcinogenic to Humans). In 2000, the United States Department of Health and Human Services revised its listing for ethylene oxide to "known to be a human carcinogen" in the Ninth Report on Carcinogens.

DHHS. 2000. Report on Carcinogens, Eleventh Edition; United States Department of Health and Human Services, Public Health Service, National Toxicology Program.
(ROC)
N/A
Final Rule Eucalyptus Oil; Exemption from the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of eucalyptus oil on honey and honeycomb when applied at 2 g or less eucalyptus oil per hive to suppress varroa mites. Brushy Mountain Bee farm, c/o IR-4 Project submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of eucalyptus oil in honey and honeycomb.

September 13, 2006 -- 71 FR 53974
National Toxicology Program. 1982. Salmonella assay for genetic toxicity from exposure to 1,8 cineole. Study 246429.

National Toxicology Program. 1982. CHO cell cytogenetics; chromosome aberrations and sister chromatid exchanges from exposure to 1,8 cineole. Study 590755.
470-82-6
Notice Request for Nominations of Drinking Water Contaminants for the Contaminant Candidate List The Environmental Protection Agency (EPA) is requesting nominations of chemical and microbial contaminants for possible inclusion in the third drinking water Contaminant Candidate List (CCL 3). EPA is also requesting information that shows the nominated contaminant may have an adverse health effect on people and the contaminant occurs or is likely to occur.

September 16, 2006 -- 71 FR 60704
N/A N/A
Proposed Proposed Test Rule for Certain Chemicals on the ATSDR/EPA CERCLA Priority List of Hazardous Substances EPA is proposing to require testing for certain chemicals on the Agency for Toxic Substances and Disease Registry (ATSDR)/EPA Priority List of Hazardous Substances which is compiled under the Comprehensive Environmental Response Compensation and Liability Act (CERCLA), and is soliciting proposals for enforceable consent agreements (ECAs). EPA is proposing a test rule under section 4(a) of the Toxic Substances Control Act (TSCA) that would require manufacturers (including importers) and processors of four chemical substances (chloroethane, hydrogen cyanide, methylene chloride, and sodium cyanide) to conduct testing for certain health effects relating to the manufacture, distribution in commerce, processing, use, or disposal of these substances.

October 20, 2006 -- 71 FR 61926
The toxicological profiles are developed by ATSDR in collaboration with EPA and NTP, independent peer reviewers, and the public. N/A
Final Rule Export Notification; Change to Reporting Requirements EPA is promulgating amendments to the Toxic Substances Control Act (TSCA) section 12(b) export notification regulations at subpart D of 40 CFR part 707. One amendment changes the current annual notification requirement to a one-time requirement for exporters of chemical substances or mixtures (hereinafter referred to as "chemicals") for which certain actions have been taken under TSCA. Relatedly, for the same TSCA actions, EPA is changing the current requirement that the Agency notify foreign governments annually after the Agency's receipt of export notifications from exporters to a requirement that the Agency notify foreign governments once after it receives the first export notification from an exporter. EPA is also promulgating de minimis concentration levels below which notification will not be required for the export of any chemical for which export notification under TSCA section 12(b) is otherwise required, promulgating other minor amendments (to update the EPA addresses to which export notifications must be sent, to indicate that a single export notification may refer to more than one section of TSCA where the exported chemical is the subject of multiple TSCA actions, and to correct an error in 40 CFR 799.19 that currently omits mentioning multi-chemical test rules as being among those final TSCA section 4 actions that trigger export notification), and clarifying exporters' and EPA's obligations where an export notification- triggering action is taken with respect to a chemical previously or currently subject to export notification due to the existence of a previous triggering action.

November 14, 2006 -- 71 FR 66234
EPA will consider the lists maintained by the World Health Organization, International Agency for Research on Cancer (IARC) and the US Department of Health and Human Services, Public Health Service, National Toxicology Program (NTP) as the definitive sources. The NTP Report on Carcinogens is mandated by section 301(b)(4) of the Public Health Service Act, as amended (42 U.S.C. 201 et seq.), which stipulates that the Secretary of the Department of Health and Human Services shall publish an annual report which contains a list of all substances: • Which either are known to be carcinogens in humans or may reasonably be anticipated to be human carcinogens • To which a significant number of persons residing in the United States are exposed. (ROC)
N/A
Final Rule Diflubenzuron; Pesticide Tolerances This regulation establishes tolerances for combined residues of diflubenzuron and its metabolites 4-chlorophenylurea and 4-chloroaniline in or on brassica, leafy greens subgroup 5B, turnip greens, peanut, peanut hay, peanut oil, barley grain, barley hay, barley straw, oat grain, oat forage, oat hay, oat straw, wheat grain, wheat forage, wheat hay, wheat straw, aspirated grain fractions, and pummelo. The Interregional Research Project #4 requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA).

November 29, 2006 -- 71 FR 69028
The Agency has classified diflubenzuron as "Group E," evidence of non-carcinogenicity for humans, based on lack of evidence of carcinogenicity in rats and mice. There are also two metabolites of diflubenzuron; PCA and CPU. PCA tested positive for splenic tumors in male rats and hepatocellular adenomas/ carcinomas in male mice in a National Toxicology Program (NTP) study. (TR-351) 35367-38-5
150-68-5
and 106-47-8
Final Rule Protection of Stratospheric Ozone: Listing of Substitutes for Ozone-Depleting Substances-n-Propyl Bromide in Solvent Cleaning The Environmental Protection Agency (EPA) determines that n-propyl bromide (nPB) is an acceptable substitute for methyl chloroform and chlorofluorocarbon (CFC)-113 in the solvent cleaning sector under the Significant New Alternatives Policy (SNAP) program under section 612 of the Clean Air Act. The SNAP program reviews alternatives to Class I and Class II ozone depleting substances and approves use of alternatives which do not present a substantially greater risk to public health and the environment than the substance they replace or than other available substitutes.

May 30, 2007 -- 72 FR 30142
These metabolic and subchronic inhalation studies conducted under the National Toxicology Program did not specifically examine for reproductive toxicity or nPB metabolism in target organs that control reproductive function. In summary, there is little available data about the metabolic activation or reactive metabolites responsible for reproductive toxicity in rodents. Similarly, for nPB, there is little information available about differences and similarities between rodents and humans. N/A
Notice Draft Toxicological Review of Bromobenzene: In Support of the Summary Information in the Integrated Risk Information System (IRIS) EPA is announcing that the Oak Ridge Institute of Science and Education (ORISE), under an Interagency agreement between the Department of Energy and EPA, will convene an independent panel of experts and organize and conduct an external peer-review workshop to review the external review draft document titled, "Toxicological Review of Bromobenzene: In Support of Summary Information on the Integrated Risk Information System (IRIS" (NCEA-C-1497). The EPA also is announcing a public comment period for the draft document. EPA intends to consider comments and recommendations from the public and the expert panel meeting when EPA finalizes the draft document.

June 14, 2007 -- 72 FR 32847
If you are requesting a paper copy, please provide your name, mailing address, and the document title. Copies are not available from ORISE. The National Toxicology Program studies referenced in the Toxicological Review of Bromobenzene are available by calling EPA's IRIS Hotline at (202) 566-1676, by fax at (202) 566-1749 or by e-mail at iris@epa.gov. N/A
Notice Draft Toxicological Review of Tetrahydrofuran: In Support of the Summary Information in the Integrated Risk Information System (IRIS) EPA is announcing that the Oak Ridge Institute of Science and Education (ORISE), under an Interagency agreement between the Department of Energy and EPA, will convene an independent panel of experts and organize and conduct an external peer-review workshop to review the external review draft document titled, "Toxicological Review of Tetrahydrofuran: In Support of Summary Information on the Integrated Risk Information System (IRIS" (NCEA-S-1620). The EPA also is announcing a public comment period for the draft document. EPA intends to consider comments and recommendations from the public and the expert panel meeting when EPA finalizes the draft document.

August 20, 2007 -- 72 FR 46483
The National Toxicology Program studies referenced in the Toxicological Review of Tetrahydrofuran are available by calling EPA's IRIS Hotline at 202-566-1676, by fax at 202-566-1749 or by e-mail at iris@epa.gov. 109-99-9
Notice Sixty-Second Report of the TSCA Interagency Testing Committee to the Administrator of the Environmental Protection Agency; Receipt of Report and Request for Comments The Toxic Substances Control Act (TSCA) Interagency Testing Committee (ITC) transmitted its sixty-second report to the Administrator of EPA on April 17, 2008. In the 62nd ITC Report, which is included with this notice, the ITC is revising the TSCA section 4(e) Priority Testing List by removing four tungsten compounds and four cresols.

May 12, 2008 -- 73 FR 27450
The ITC is removing tungsten oxide (WO3), a.k.a. tungsten trioxide because of the voluntary information provided by the International Tungsten Industry Association and their cooperation in a National Toxicology Program/National Institute for Occupational Safety and Health research program to address exposure and toxicity data needs. The ITC is retaining tungstate (WO42-), disodium, dihydrate, (T-4)-, a.k.a. sodium tungstate (Na2 (WO4)), dihydrate (CAS No. 10213-10-2), on the Priority Testing List because of ongoing discussions with the International Tungsten Industry Association. 1314-35-8
10213-10-2
Final Rule Control of Emissions of Air Pollution from Locomotive Engines and Marine Compression-Ignition Engines Less than 30 Liters per Cylinder; Republication EPA is adopting a comprehensive program to dramatically reduce pollution from locomotives and marine diesel engines. The controls will apply to all types of locomotives, including line-haul, switch, and passenger, and all types of marine diesel engines below 30 liters per cylinder displacement, including commercial and recreational, propulsion and auxiliary. The near-term emission standards for newly-built engines will phase in starting in 2009. The near-term program also includes new emission limits for existing locomotives and marine diesel engines that apply when they are remanufactured, and take effect as soon as certified remanufacture systems are available, as early as 2008. The long-term emissions standards for newly-built locomotives and marine diesel engines are based on the application of high-efficiency catalytic after-treatment technology. These standards begin to take effect in 2015 for locomotives and in 2014 for marine diesel engines. We estimate particulate matter (PM) reductions of 90 percent and nitrogen oxides (NOX) reductions of 80 percent from engines meeting these standards, compared to engines meeting the current standards.

June 30, 2008 -- 73 FR 37096
The National Toxicology Program listed naphthalene as "reasonably anticipated to be a human carcinogen" in 2004 on the basis of bioassays reporting clear evidence of carcinogenicity in rats and some evidence of carcinogenicity in mice. (ROC) 

The IARC has determined that benzene is a human carcinogen and the U.S. DHHS has characterized benzene as a known human carcinogen. (ROC)

The IARC has determined that 1,3-butadiene is a human carcinogen and the U.S. DHHS has characterized 1,3-butadiene as a known human carcinogen. (ROC)

Acetaldehyde is reasonably anticipated to be a human carcinogen by the U.S. Department of Health and Human Services (DHHS) in the 11th Report on Carcinogens and is classified as possibly carcinogenic to humans (Group 2B) by the International Agency for Research on Carcinogens (IARC). (ROC)

91-20-3
71-43-2
106-99-0
75-07-0
Other Dichlorvos (DDVP); Order Denying NRDCs Objections and Requests for Hearing In this order, EPA denies objections to, and requests for hearing on, a prior order denying a petition requesting that EPA revoke all pesticide tolerances for dichlorvos under section 408(d) of the Federal Food, Drug, and Cosmetic Act. The objections and hearing requests were filed on February 1, 2008, by the Natural Resources Defense Council (NRDC). The Original petition was also filed by NRDC.

July 23, 2008 -- 73 FR 42683
In the 1989 NTP cancer studies with rats and mice, male and female reproductive organs (prostate, testes, epididymis, ovaries, uterus) were examined and no changes attributable to DDVP were found. (TR-342) 62-73-7
Final Rule Control of Emissions From Nonroad Spark-Ignition Engines and Equipment We are setting emission standards for new non-road spark-ignition engines that will substantially reduce emissions from these engines. The exhaust emission standards apply starting in 2010 for new marine spark-ignition engines, including first-time EPA standards for stern-drive and inboard engines. The exhaust emission standards apply starting in 2011 and 2012 for different sizes of new land-based, spark-ignition engines at or below 19 kilowatts (kW). These small engines are used primarily in lawn and garden applications. We are also adopting evaporative emission standards for vessels and equipment using any of these engines. In addition, we are making other minor amendments to our regulations.

October 8, 2008 -- 73 FR 59034
The International Agency for Research on Carcinogens (IARC) has determined that benzene is a human carcinogen and the U.S. Department of Health and Human Services (DHHS) has characterized benzene as a known human carcinogen. (ROC)

The IARC has determined that 1,3-butadiene is a human carcinogen and the U.S. DHHS has characterized 1,3-butadiene as a known human carcinogen. (ROC)

Acetaldehyde is reasonably anticipated to be a human carcinogen by the U.S. DHHS in the 11th Report on Carcinogens and is classified as possibly carcinogenic to humans (Group 2B) by the IARC. (ROC)

The National Toxicology Program listed naphthalene as "reasonably anticipated to be a human carcinogen" in 2004 on the basis of bioassays reporting clear evidence of carcinogenicity in rats and some evidence of carcinogenicity in mice. (ROC)
71-43-2
106-99-0
75-07-0
91-20-3
Notice Sixty-Third Report of the TSCA Interagency Testing Committee to the Administrator of the Environmental Protection Agency; Receipt of Report and Request for Comments The Toxic Substances Control Act (TSCA) Interagency Testing Committee (ITC) transmitted its 63rd Report to the Administrator of the EPA on October 7, 2008. In the 63rd ITC report, which is included with this notice, the ITC is revising the TSCA section 4(e) Priority Testing List by removing 1 tungsten compound and 1 High Production Volume (HPV) Challenge Program orphan chemical.

November 3, 2008 -- 73 FR 65486
At this time the ITC is removing tungstate (WO42-), disodium, dihydrate, (T-4)-, a.k.a. disodium tungstate (Na2WO4) dihydrate (CAS No. 10213-10-2) from the Priority Testing List because of the voluntary information provided by the International Tungsten Industry Association and their cooperation in a National Toxicology Program/National Institute for Occupational Safety and Health research program to address exposure and toxicity data needs. 10213-10-2
Final Rule National Ambient Air Quality Standards for Lead Based on its review of the air quality criteria and national ambient air quality standards (NAAQS) for lead (Pb), EPA is making revisions to the primary and secondary NAAQS for Pb to provide requisite protection of public health and welfare, respectively. With regard to the primary standard, EPA is revising the level to 0.15 μg/m3. EPA is retaining the current indicator of Pb in total suspended particles (Pb-TSP). EPA is revising the averaging time to a rolling 3-month period with a maximum (not-to-be-exceeded) form, evaluated over a 3-year period. EPA is revising the secondary standard to be identical in all respects to the revised primary standard.

November 12, 2008 -- 73 FR 66964

Lead has been classified as a probable human carcinogen by the International Agency for Research on Cancer (inorganic lead compounds), based mainly on sufficient animal evidence, and as reasonably anticipated to be a human carcinogen by the U.S. National Toxicology Program (lead and lead compounds). ROC

NA
Final Rule Inert Ingredient: Exemption from the Requirement of a Tolerance for (S,S)Ethylenediaminedisuccinic Acid This regulation establishes an exemption from the requirement of a tolerance for residues of (S,S)Ethylenediaminedisuccinic acid (CAS Reg. No. 20846-91-7) ((S,S)EDDS) when used as an inert ingredient sequestrant or chelating agent in pesticide formulations applied to growing crops only under 40 CFR 180.920. Associated Octel Company, Limited, submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of (S,S)Ethylenediaminedisuccinic acid.

November 14, 2008 -- 73 FR 67397
No carcinogenicity studies are available on (S,S)EDDS, however, NTP tested trisodium EDTA in mice and rats showed no carcinogenic potential. Based on its similarity with EDTA and lack of mutagenicity, (S,S)EDDS is not likely to be carcinogenic to humans at low doses. (TR-011) CAS No. 150-38-9
Final Rule Diflubenzuron; Pesticide Tolerances for Emergency Exemptions This regulation establishes time-limited tolerances for combined residues of diflubenzuron and its metabolites p-chlorophenylurea and p-chloroaniline in or on alfalfa, forage and alfalfa, hay. This action is in response to EPAs granting of an emergency exemption under section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) authorizing use of the pesticide on alfalfa and mixed grass/alfalfa fields. This regulation establishes a maximum permissible level for residues of diflubenzuron and its metabolites p-chlorophenylurea and p-chloroaniline, in these food commodities. The time-limited tolerances expire and are revoked on December 31, 2011.

November 28, 2008 -- 73 FR 72352
There are two metabolites of diflubenzuron; PCA and CPU. PCA tested positive for splenic tumors in male rats and hepatocellular adenomas/carcinomas in male mice in a National Toxicology Program (NTP) study. (TR-351) 20265-96-7
Proposed Regulation of Fuels and Fuel Additives: Changes to Renewable Fuel Standard Program Under the Clean Air Act, as amended by Sections 201, 202, and 210 of the Energy Independence and Security Act of 2007, the Environmental Protection Agency is required to promulgate regulations implementing changes to the Renewable Fuel Standard program.

May 26, 2009 -- 74 FR 25053
Acetaldehyde is reasonably anticipated to be a human carcinogen by the U.S. DHHS in the 11th Report on Carcinogens. (Acetaldehyde) The U.S. Department of Health and Human Services (DHHS) has characterized benzene as a known human carcinogen. (Benzene) The U.S. DHHS has characterized 1,3-butadiene as a known human carcinogen. (1,3-Butadiene) The U.S. DHHS in the 11th Report on Carcinogens identified alcoholic beverages as a known human carcinogen (they have not evaluated the cancer risks specifically from exposure to ethanol), with evidence for cancer of the mouth, pharynx, larynx, esophagus, liver and breast. (Ethanol) The National Toxicology Program listed naphthalene as reasonably anticipated to be a human carcinogen in 2004 on the basis of bioassays reporting clear evidence of carcinogenicity in rats and some evidence of carcinogenicity in mice. (Naphthalene ) (ROC) 75-07-0
71-43-2
106-99-0
64-17-5
91-20-3
Final Rule Residues of Silver in Foods from Food Contact Surface Sanitizing Solutions; Exemption from the Requirement of a Tolerance This regulation amends the exemption from the requirement of a tolerance for residues of silver (excludes silver salts) in or on all foods when applied or used in public eating places, dairy processing equipment, and food processing equipment. ETO H2O, Inc., submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act requesting to establish concentration limits for silver in end-use solutions eligible for tolerance exemption. The regulation being established will exempt all foods from the requirement of a tolerance for residues of silver resulting from contact with surfaces treated with solutions in which the end-use concentration of silver is not to exceed 50 parts per million (ppm).

June 10, 2009 -- 74 FR 27447
There are extensive data and analysis on silvers toxicity in the historical data/literature and the regulatory advisories established by other Federal Agencies, which do not indicate an increased susceptibility of children to the toxic effects of silver. A NTP developmental toxicity study concluded that the NOAEL recorded for developmental toxicity in rats receiving gavage doses of silver acetate was greater than 100 mg/ kg when the test material was administered on gestation days 6 through 19. No increase in susceptibility was apparent in this study. NA
Final Rule Amine Salts of Alkyl (C8-C24) Benzenesulfonic Acid (Dimethylaminopropylamine, Isopropylamine, Mono-, Di-, and Triethanolamine); Exemption from the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of amine salts of alkyl (C8-C24) benzenesulfonic acid (dimethylaminopropylamine, isopropylamine, mono-, di-, and triethanolamine) when used as an inert ingredient in pesticide formulations applied to growing crops and applied to animals. The Joint Inerts Task Force, Cluster Support Team Number 8, submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of amine salts of alkyl (C8-C24) benzenesulfonic acid (dimethyl aminopropylamine, isopropylamine, mono-, di, and triethanolamine).

August 5, 2009 -- 74 FR 38924
Subchronic (13-week) oral toxicity study in rats (NTP, 1992). (Diethanolamine) 111-42-2
Proposed Proposed Rulemaking To Establish Light-Duty Vehicle Greenhouse Gas Emission Standards and Corporate Average Fuel Economy Standards EPA and NHTSA are issuing this joint proposal to establish a National Program consisting of new standards for light-duty vehicles that will reduce greenhouse gas emissions and improve fuel economy. This joint proposed rulemaking is consistent with the National Fuel Efficiency Policy announced by President Obama on May 19, 2009, responding to the country’s critical need to address global climate change and to reduce oil consumption. EPA is proposing greenhouse gas emissions standards under the Clean Air Act, and NHTSA is proposing Corporate Average Fuel Economy standards under the Energy Policy and Conservation Act, as amended. These standards apply to passenger cars, light-duty trucks, and medium-duty passenger vehicles, covering model years 2012 through 2016, and represent a harmonized and consistent National Program. Under the National Program, automobile manufacturers would be able to build a single light-duty national fleet that satisfies all requirements under both programs while ensuring that consumers still have a full range of vehicle choices.

September 28, 2009 -- 74 FR 49553
The National Toxicology Program in its Report on Carcinogens has characterized many components of automobile and truck engines to be known or potential carcinogens. They are benzene, 1, 3-butadiene, acetaldehyde, and naphthalene. (ROC) 71-43-2
106-99-0
75-07-0
91-20-3
Proposed Lead; Amendment to the Opt-out and Recordkeeping Provisions in the Renovation, Repair, and Painting Program EPA proposes several revisions to the Lead Renovation, Repair, and Painting Program (RRP) rule that published in the Federal Register on April 22, 2008. The rule establishes accreditation, training, certification, and recordkeeping requirements, as well as work practice standards on persons performing renovations for compensation in most pre-1978 housing and child-occupied facilities. In this document, EPA proposes eliminating the ‘‘opt-out’’ provision that currently exempts a renovation firm from the training and work practice requirements of the rule where the firm obtains a certification from the owner of a residence he or she occupies that no child under age 6 or pregnant women resides in the home and the home is not a child- occupied facility. EPA also proposes requiring renovation firms to provide a copy of the records demonstrating compliance with the training and work practice requirements of the RRP rule to the owner and, if different, the occupant of the building being renovated or the operator of the child-occupied facility.

October 28, 2009 -- 74 FR 55506
Lead exerts ‘‘a broad array of deleterious effects on multiple organ systems via widely diverse mechanisms of action’’. Health effects include impacts on heme biosynthesis and related functions, neurological development and function, reproduction and physical development, kidney function, cardiovascular function, and immune function. There is also some evidence of lead carcinogenicity, primarily from animal studies, together with limited human evidence of suggestive associations. (Lead) 7439-92-1
Notice Agency Information Collection Activities; Proposed Collection; Comment Request; Analysis of Archived Environmental Samples From the American Healthy Homes Survey (New); EPA ICR No. XXXX.XX, OMB Control No. 20XX–XXXX In compliance with the Paperwork Reduction Act (PRA) (44 U.S.C. 3501 et seq.), this document announces that EPA is planning to submit a request for a new Information Collection Request (ICR) to the Office of Management and Budget (OMB). Before submitting the ICR to OMB for review and approval, EPA is soliciting comments on specific aspects of the proposed information collection as described below.

November 3, 2009 -- 74 FR 56831

NTP Work Cited: Phthalates are used in the manufacture of a wide range of industrial and household consumer products to prolong durability and increase the flexibility of plastics and as chemical stabilizers for other materials. Animal data suggest a broad spectrum of potential health outcomes including developmental toxicity, endocrine disruption, and carcinogenicity. However, the characterization of human exposure to phthalates is limited and the National Toxicology Program’s Center for the Evaluation of the Risks to Human Reproduction has concluded that more data regarding the potential for human exposure are needed. 

OHAT (formerly CERHR) Evaluations and Workshops, see phthalates. (OHAT)

NA
Proposed Public Availability of Identities of Inert Ingredients in Pesticides In response to two petitions seeking disclosure of selected inert ingredients on pesticide labels, based on hazard, EPA is initiating rulemaking to increase public availability of the identities of the inert ingredients in pesticide products. This action would assist consumers and users of pesticides in making informed decisions and reduce the presence of potentially hazardous ingredients in pesticides.

December 23, 2009 -- 74 FR 68215
Suggested hazard criteria, which could be used to identify potential carcinogenic substances to be listed in the ingredient statement, include (1) known or presumed human carcinogens and those classified as Group 1 or Group 2 by the International Agency for Research on Cancer (IARC); (2) evidence of carcinogenic activity by the National Toxicology Program (NTP) and/or the Environmental Protection Agency (EPA); and/or (3) a Category I Potential Carcinogen by the Occupational Safety and Health Administration (OSHA). NA
Proposed Testing of Certain High Production Volume Chemicals; Third Group of Chemicals EPA is proposing a test rule under section 4(a)(1)(B) of the Toxic Substances Control Act (TSCA) that would require manufacturers, importers, and processors of certain high production volume (HPV) chemicals to conduct testing to obtain screening level data for health and environmental effects and chemical fate.

March 26, 2010 -- 75 FR 14769
Acetaldehyde, benzene, 1,3-butadiene, alcoholic beverages, and naphthalene are reasonably anticipated to be a human carcinogen by the U.S. Department of Health and Human Services National Toxicology Program 12th Report on Carcinogens. (ROC) 75-07-0
71-43-2
106-99-0
91-20-3
Proposed Addition of National Toxicology Program (NTP) Carcinogens; Community Right-to-Know Toxic Chemical Release Reporting EPA is proposing to add sixteen (16) chemicals to the list of toxic chemicals subject to reporting under section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA) of 1986 and section 6607 of the Pollution Prevention Act of 1990.

April 6, 2010 -- 75 FR 17333
These 16 chemicals have been classified by the NTP in their Report on Carcinogens (ROC) as "reasonably anticipated to be a human carcinogen."
1-Amino-2,4- Dibromoanthraquinone (CAS No. 81-49-2)
2,2-bis(Bromomethyl)-1,3- propanediol (CAS No. 3296-90-0)
Furan (CAS No. 110-00-9)
Glycidol (CAS No. 556-52-5)
Isoprene (CAS No. 78-79-5)
Methyleugenol (CAS No. 93-15-2)
1,6-Dinitropyrene (CAS No. 42397-64-8)
1,8-Dinitropyrene (CAS No. 42397-65-9)
6-Nitrochrysene (CAS No. 7496-02-8)
4-Nitropyrene (CAS No. 57835-92-4)
o-Nitroanisole (CAS No. 91-23-6)
Nitromethane (CAS No. 75-52-5)
Phenolphthalein (CAS No. 77-09-8)
Tetrafluoroethylene (CAS No. 116-14-3)
Tetranitromethane (CAS No. 509-14-8)
Vinyl Fluoride (CAS No. 75-02-5)
81-49-2
3296-90-0
110-00-9
556-52-5
78-79-5
93-15-2
42397-64-8
42397-65-9
7496-02-8
57835-92-4
91-23-6
75-52-5
77-09-8
116-14-3
509-14-8
75-02-5
Proposed Hazardous Waste Management System; Identification and Listing of Hazardous Waste; Removal of Saccharin and Its Salts From the Lists of Hazardous Constituents, Hazardous Wastes, and Hazardous Substances The Environmental Protection Agency (EPA or the Agency) is proposing to amend its regulations under the Resource Conservation and Recovery Act (RCRA) to remove saccharin and its salts from the lists of hazardous constituents and commercial chemical products, which are hazardous wastes when discarded or intended to be discarded. EPA is also proposing to amend the regulations under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) to remove saccharin and its salts from the list of hazardous substances. This proposed rule is in response to a petition submitted to EPA by the Calorie Control Council (CCC), to remove saccharin and its salts from the above lists. EPA is proposing to grant CCC's petition based on a review of the evaluations conducted by key public health agencies concerning the carcinogenic and other potential toxicological effects of saccharin and its salts, as well as EPA’s own assessment of the waste generation and management information for saccharin and its salts, which demonstrate that saccharin and its salts do not meet the criteria in the hazardous waste regulations for remaining on EPA's lists of hazardous constituents, hazardous wastes, and hazardous substances.

April 22, 2010 -- 75 FR 20942
EPA believes that saccharin and its salts, based on the results of the latest reviews of the available scientific information performed by NTP and IARC, do not pose a present or potential risk of causing toxic, carcinogenic, mutagenic or teratogenic effects on humans or other life forms. (ROC)   81-07-2
Final Rule (S,S)-Ethylenediamine Disuccinic Acid Trisodium Salt; Exemption From the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of (S,S)-ethylenediamine disuccinic acid trisodium salt (CAS Reg. No. 178949–82–1) when used as an inert ingredient (sequestrant or chelating agent) in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest under EPA regulations. Innospec Limited submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of (S,S)-ethylenediamine disuccinic acid trisodium salt.

February 4, 2011 -- 76 FR 6347
NTP tested trisodium ethylenediaminetetraacetate trihydrate (EDTA)in mice and rats and it showed no carcinogenic potential. Since (S,S)-ethylenediamine disuccinic acid trisodium salt is similar to EDTA, (S,S)-EDDS is not likely to be carcinogenic to humans at low doses. (TR-11) (TS) 178949–82–1
Notice Agency Information Collection Activities; Proposed Collections; Toxic Chemical Release Reporting; Request for Comments on Proposed Renewal of Form R and Form A, Including Minor Form Revisions and the Ratio-Based Burden Methodology In compliance with the Paperwork Reduction Act (PRA)(44 U.S.C. 3501 et seq.), EPA is planning to submit a request to renew an existing approved Information Collection Request (ICR) to the Office of Management and Budget (OMB). This ICR is scheduled to expire on July 31, 2011. The ICR Supporting Statement, which is summarized below and also posted in the docket, along with a technical document titled ‘‘Revising TRI Burden to Ratio-Based Methodology,’’ describes the nature of the information collection (including proposed form changes) and its estimated burden and cost. Before submitting the ICR to OMB for review and approval, EPA is soliciting comments on specific aspects of the proposed information collection as described below.

February 11, 2011 -- 76 FR 7841
On November 26, 2010, the Addition of National Toxicology Program Carcinogens rule was published in the Federal Register.

The addition of National Toxicology Program Carcinogens rule, affects the EPA’s Information ColIection Request (ICR) by increasing the number of reporting facilities by 74 and the number of Form Rs submitted by 186 with an associated burden increase of 6,641 hours.
N/A
Final Rule Sodium Ferric Ethylenediaminetetraacetate; Exemption From the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of sodium ferric ethylenediaminetetraacetate (EDTA) in or on all food commodities when applied as a molluscicide and used in accordance with good agricultural practices. W. Neudorff GmbH KG submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of sodium ferric EDTA under the FFDCA.

March 30, 2011 -- 76 FR 17556
National Toxicology Program (NTP); Technical Report Series No. 11. (TR-11) 178949–82–1
Notice Draft Toxicological Review of Methanol (Non-Cancer) in Support of Summary Information on the Integrated Risk Information System (IRIS) EPA is announcing a 60-day public comment period and listening session for the external review draft human health assessment titled, ‘‘Toxicological Review of Methanol (Non-Cancer): In Support of Summary Information on the Integrated Risk Information System (IRIS)’’ (EPA/635/R–11/001). The draft assessment was prepared by the National Center for Environmental Assessment (NCEA) within the EPA Office of Research and Development (ORD). EPA is releasing this draft assessment solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. This draft assessment has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency policy or determination.

April 18, 2011 -- 76 FR 21736
A National Toxicology Program report recommended performing pathology reviews to resolve differences of opinion in the diagnoses of certain tumors reported in a Ramazzini Institute methanol research study. This study was cited and used to support some of the conclusions in the draft IRIS Methanol Toxicological Review. Following the report from the National Toxicology Program, EPA placed the external peer review of the draft IRIS Methanol Toxicological Review on hold. (IRIS) NA
Proposed National Emission Standards for Hazardous Air Pollutants From Coal- and Oil-Fired Electric Utility Steam Generating Units and Standards of Performance for Fossil-Fuel-Fired Electric Utility, Industrial-Commercial-Institutional, and Small Industrial-Commercial-Institutional Steam Generating Units The United States (U.S.) Environmental Protection Agency (EPA or Agency) is proposing national emission standards for hazardous air pollutants (NESHAP) from coal- and oil-fired electric utility steam generating units (EGUs) under Clean Air Act (CAA or the Act) section 112(d) and proposing revised new source performance standards (NSPS) for fossil-fuel-fired EGUs under CAA section 111(b). The proposed NESHAP would protect air quality and promote public health by reducing emissions of the hazardous air pollutants (HAP) listed in CAA section 112(b). In addition, these proposed amendments to the NSPS are in response to a voluntary remand of a final rule. We also are proposing several minor amendments, technical clarifications, and corrections to existing NSPS provisions for fossil-fuel-fired EGUs and large and small industrial-commercial-institutional steam generating units.

May 3, 2011 -- 76 FR 25053
Acetaldehyde is reasonably anticipated to be a human carcinogen. Benzene is characterized as a known human carcinogen. Both are cited in the National Toxicology Program’s Report on Carcinogens. (ROC) 75-07-0
71-43-2
Notice Agency Information Collection Activities; Submission to OMB for Review and Approval; Proposed Collections; Toxic Chemical Release Reporting; Request for Comments on Proposed Renewal of Form R and Form A, Including Minor Form Revisions and the Ratio-Based Burden Methodology In compliance with the Paperwork Reduction Act (PRA) (44 U.S.C. 3501 et seq.), this document announces that an Information Collection Request (ICR) has been forwarded to the Office of Management and Budget (OMB) for review and approval. This is a request to make changes to and renew an existing approved collection. The ICR Supporting Statement, which is abstracted below, describes the nature of the information collection (including proposed minor form revisions) and its estimated burden and cost.

May 26, 2011 -- 76 FR 30700
Addition of National Toxicology Program Carcinogens rule is estimated to increase the number of reporting facilities by 74 and the number of Form Rs submitted by 186 with an associated burden increase of 6,641 hours. N/A
Final Rule Ethylene Glycol; Exemption from the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of ethylene glycol (CAS Reg. No. 107-21-1) when used as a pesticide inert ingredient as a solvent, stabilizer and/or antifreeze within pesticide formulations/products without limitation. Huntsman, et. al, submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting an establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of ethylene glycol. Also, this regulation establishes an exemption from the requirement of a tolerance for residues of ethylene glycol (CAS Reg. No. 107-21-1) when used as an inert ingredient as an encapsulating agent for pesticides being applied post-harvest as residual, and crack and crevice sprays in and around food and nonfood areas of residential and nonresidential structures, including food handling establishments, with no limit. The Sumitomo Chemical Company submitted a petition to EPA under FFDCA, requesting an establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of ethylene glycol.

June 1, 2011 -- 76 FR 31471
Based on the lack of mutagenicity and lack of carcinogenicity in rodents, ethylene glycol is not expected to pose a carcinogenic risk in humans. (TR-26) 109-86-4
110-80-5
111-76-2
Final Rule Diethylene Glycol MonoEthyl Ether (DEGEE); Exemption From the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of Diethylene Glycol MonoEthyl Ether (DEGEE) when used as an inert ingredient as a solvent, stabilizer and/or antifreeze within pesticide formulations/products, for preharvest use on growing crops and raw agricultural commodities, without limitation. Huntsman, Dow AgroSciences L.L.C., Nufarm Americas Inc., BASF, Stepan Company, Loveland Products Inc., and Rhodia Inc. submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of DEGEE on growing crops and raw agricultural commodities.

June 22, 2011 -- 76 FR 36349
Ethylene glycol, which is structurally similar to DEGEE, does not cause carcinogenicity in mice. (TR-413) 107-21-1
Notice Testing of Bisphenol A Bisphenol A (BPA) (Chemical Abstracts Service Registry Number (CASRN) 80-05-7), a high production volume (HPV) chemical, is a reproductive, developmental, and systemic toxicant in animal studies and is weakly estrogenic. EPA is providing this ANPRM to request comment on requiring toxicity testing to determine the potential for BPA to cause adverse effects, including endocrine-related effects, in environmental organisms at low concentrations. EPA is also seeking comment on requiring environmental testing consisting of sampling and monitoring for BPA in surface water, ground water, drinking water, soil, sediment, sludge, and landfill leachate in the vicinity of expected BPA releases to determine whether environmental organisms may currently be exposed to concentrations of BPA in the environment that are at or above levels of concern for adverse effects, including endocrine-related effects. This ANPRM is directed only toward the environmental presence and environmental effects of BPA. EPA is working with the Department of Health and Human Services (HHS) on potential human health issues, but is not considering any additional testing specifically in regard to human health issues at this time.

July 26, 2011 -- 76 FR 44535
BPA is a reproductive and developmental toxicant. Studies show reduced fetal or birth weight or growth early in life, effects on testis of male rats, possible decreased fertility in mice, altered estrous cycling in female rats, and reduced survival of fetuses. There are also reports of endocrine-related low-dose effects on puberty and neurological development. (Monograph on Bisphenol A) 80-05-7
Final Rule Carboxymethyl Guar Gum Sodium Salt and Carboxymethyl-Hydroxypropyl Guar; Exemption From the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of carboxymethyl guar gum sodium salt (CAS Reg. No. 39346-76-4) and carboxymethyl-hydroxypropyl guar (CAS Reg. No. 68130-15-4); when used as an inert ingredient (thicker/drift reduction agent) in pesticide formulations applied to growing crops. SciReg Inc., on behalf of Rhodia Inc., submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of carboxymethyl guar gum sodium salt and carboxymethyl-hydroxypropyl guar.

July 27, 2011 -- 76 FR 44811
In carcinogenicity studies in mice and rats, no adverse effects were observed. (TR-229) 9000-30-0
Notice Harmful and Potentially Harmful Constituents in Tobacco Products and Tobacco Smoke; Request for Comments The Food and Drug Administration (FDA) is requesting comments, including scientific and other information, concerning the harmful and potentially harmful constituents (HPHCs) in tobacco products and tobacco smoke. This information will assist the Agency in establishing a list of HPHCs in tobacco products and tobacco smoke (the HPHC list).

August 12, 2011 -- 76 FR 50226
National Toxicology Program has identified constituents in tobacco products and tobacco smoke as human carcinogens or reasonably anticipated to be human carcinogens. (ROC) N/A
Final Rule Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles EPA and NHTSA, on behalf of the Department of Transportation, are each finalizing rules to establish a comprehensive Heavy-Duty National Program that will reduce greenhouse gas emissions and fuel consumption for on-road heavy-duty vehicles, responding to the President's directive on May 21, 2010, to take coordinated steps to produce a new generation of clean vehicles. NHTSA's final fuel consumption standards and EPA's final carbon dioxide (CO2) emissions standards are tailored to each of three regulatory categories of heavy-duty vehicles: Combination Tractors; Heavy-duty Pickup Trucks and Vans; and Vocational Vehicles. The rules include separate standards for the engines that power combination tractors and vocational vehicles. Certain rules are exclusive to the EPA program. These include EPA's final hydrofluorocarbon standards to control leakage from air conditioning systems in combination tractors, and pickup trucks and vans. These also include EPA's final nitrous oxide (N2O) and methane (CH4) emissions standards that apply to all heavy-duty engines, pickup trucks and vans. EPA's final greenhouse gas emission standards under the Clean Air Act will begin with model year 2014. NHTSA's final fuel consumption standards under the Energy Independence and Security Act of 2007 will be voluntary in model years 2014 and 2015, becoming mandatory with model year 2016 for most regulatory categories. Commercial trailers are not regulated in this phase of the Heavy-Duty National Program. The agencies estimate that the combined standards will reduce CO2 emissions by approximately 270 million metric tons and save 530 million barrels of oil over the life of vehicles sold during the 2014 through 2018 model years, providing over $7 billion in net societal benefits, and $49 billion in net societal benefits when private fuel savings are considered. EPA is also finalizing provisions allowing light-duty vehicle manufacturers to use CO2 credits to meet the light-duty vehicle N2O and CH4 standards, technical amendments to the fuel economy provisions for light-duty vehicles, and a technical amendment to the criteria pollutant emissions requirements for certain switch locomotives.

September 15, 2011 -- 76 FR 57106
In the National Toxicology Program’s Report on Carcinogens (ROC), the following compounds have been listed as: a) known carcinogens to humans: Benzene, 1,3-Butadiene; b) possibly carcinogenic to humans: acetaldehyde; or c) reasonably anticipated to be a human carcinogen: naphthalene. 71-43-2
106-99-0
75-07-0
91-20-3
Final Rule Testing of Certain High Production Volume Chemicals; Third Group of Chemicals EPA is promulgating this final rule under section 4(a)(1)(B) of the Toxic Substances Control Act (TSCA) to require manufacturers, importers, and processors to conduct testing to obtain screening level data for health and environmental effects and chemical fate for 15 high production volume (HPV) chemical substances listed in this final rule. This test data is needed in order to help EPA to determine whether these 15 HPV chemical substances pose a risk to human health and/or environmental safety. Based on comments received by EPA on the proposed rule for this final rule, EPA has determined that only 15 of the 29 HPV chemical substances proposed for testing meet the criteria for testing at this time.

October 21, 2011 -- 76 FR 65385
NTP Work Cited: National Toxicology Program’s Interagency Center for the Evaluation of Alternative Toxicological Methods (NICEATM) developed test method protocols for the uptake of neutral red as a test for cytotoxicity. NA
Proposed Certain High Production Volume Chemicals; Test Rule and Significant New Use Rule; Fourth Group of Chemicals EPA is proposing to issue a test rule under Toxic Substances Control Act (TSCA) section 4(a)(1)(B) to require manufacturers and processors of 23 high production volume (HPV) chemical substances to develop screening-level health, environmental, and fate data based on the potential for substantial exposures of workers and consumers to these chemicals. EPA is also proposing to issue simultaneously a significant new use rule (SNUR) for another 22 HPV chemical substances under TSCA section 5(a)(2). The SNUR would require persons to file a significant new use notice (SNUN) with EPA prior to manufacturing, importing, or processing any of these chemical substances for use in a consumer product or for any use, or combination of uses, that is reasonably likely to expose 1,000 or more workers at a single corporate entity. The required notification would provide EPA with the opportunity to evaluate the intended use and, if necessary, to prohibit or limit that activity before it occurs. EPA is also soliciting comment on a number of issues with regard to both the test rule and the SNUR.

October 21, 2011 -- 76 FR 65580
NTP Work Cited: National Toxicology Program’s Interagency Center for the Evaluation of Alternative Toxicological Methods (NICEATM) developed test method protocols for the uptake of neutral red as a test for cytotoxicity. Standardized protocols are referenced. NA
Proposed National Emissions Standards for Hazardous Air Pollutants: Ferroalloys Production The EPA is proposing amendments to the national emissions standards for hazardous air pollutants for Ferroalloys Production to address the results of the residual risk and technology review that the EPA is required to conduct under the Clean Air Act. These proposed amendments include revisions to particulate matter standards for electric arc furnaces, metal oxygen refining processes, and crushing and screening operations. The amendments also add emission limits for hydrochloric acid, mercury, polycyclic aromatic hydrocarbons, and formaldehyde from electric arc furnaces. Furthermore, the amendments expand and revise the requirements to control fugitive emissions from furnace operations and casting. Other proposed requirements related to testing, monitoring, notification, recordkeeping, and reporting are included. We are also proposing to revise provisions addressing periods of startup, shutdown, and malfunction to ensure that the rules are consistent with a recent court decision.

November 23, 2011 -- 76 FR 72508
NTP Work Cited: EPA cited the National Toxicology Program’s Report on Carcinogens (ROC), which states that nickel compounds are known human carcinogens. NA
Final Rule National Emission Standards for Hazardous Air Pollutants From Coal- and Oil-Fired Electric Utility Steam Generating Units and Standards of Performance for Fossil-Fuel-Fired Electric Utility, Industrial-Commercial-Institutional, and Small Industrial-Commercial-Institutional Steam Generating Units On May 3, 2011, under authority of Clean Air Act (CAA) sections 111 and 112, the EPA proposed both national emission standards for hazardous air pollutants (NESHAP) from coal- and oil-fired electric utility steam generating units (EGUs) and standards of performance for fossil-fuel-fired electric utility, industrial-commercial-institutional, and small industrial-commercial-institutional steam generating units (76 FR 24976). After consideration of public comments, the EPA is finalizing these rules in this action.

February 16, 2012 -- 77 FR 9304
NTP 2-year rodent bioassay of Ni sulfate hexahydrate (water soluble) showed no evidence of carcinogenicity (TR-454); NTP 2-year rodent bioassay of Ni subsulfide showed clear evidence of carcinogenicity (TR-453); NTP’s Report on Carcinogens states considering Ni compounds to be carcinogenic as a group (ROC). 10101-97-0
12035-72-2
Proposed Benzidine-Based Chemical Substances; Di-n-pentyl phthalate (DnPP); and Alkanes, C12–13, Chloro; Proposed Significant New Use Rules Under the Toxic Substances Control Act (TSCA), EPA is proposing: To add nine benzidine-based chemical substances to the Significant New Use Rule (SNUR) on benzidine-based chemical substances; a SNUR for di-n-pentyl phthalate (DnPP) (1,2-benzenedicarboxylic acid, 1,2-dipentyl ester) (CAS No. 131-18-0); and a SNUR for alkanes, C12–13, chloro (CAS No. 71011-12-6). In the case of the benzidine-based chemical substances, EPA is also proposing to make inapplicable the exemption relating to persons that import or process substances as part of an article. If finalized, this rule would require persons who intend to manufacture, import, or process these chemical substances for an activity that is designated as a significant new use to notify EPA at least 90 days before commencing that activity. The required notification would provide EPA with the opportunity to evaluate activities associated with a significant new use and an opportunity to protect against potential unreasonable risks, if any, from exposure to the chemical substance.

March 28, 2012 -- 77 FR 18752
Benzidine-based dyes are metabolized to its parent molecule, which is a known carcinogen (ROC). Exposure to phthalates in animal studies caused a decreased development of the reproductive system. A study of Di-n-pentyl phthalate showed a decrease in the number of litters from fertile pairs, decreased number of live pups, and decreased fertility and reproduction 92-87-5
131-18-0
Other Integrated Risk Information System (IRIS); Announcement of 2012 Program The U.S. Environmental Protection Agency (EPA) is announcing the IRIS 2012 agenda and requesting scientific information on health effects that may result from exposure to the chemical substances on the agenda, including assessments that EPA is starting this year.

May 7, 2012 -- 77 FR 26751
(Draft Monograph on Health Effects of Low-Level Lead) 7439-92-1
Notice Sixty-Ninth Report of the TSCA Interagency Testing Committee to the Administrator of the Environmental Protection Agency; Receipt of Report and Request for Comments The Toxic Substances Control Act (TSCA) Interagency Testing Committee (ITC) transmitted its 69th Report to the EPA Administrator on April 5, 2012. In the 69th ITC Report, which is included with this notice, the ITC is adding a category of cadmium compounds including any chemical that contains cadmium as part of that chemical's structure, 6 non-phthalate plasticizers, 25 phosphate ester flame retardants, 2 other flame retardants, 9 chemicals to which children living near hazardous waste sites may be exposed, and a category of 69 diisocyanates and related compounds (including 14 Action Plan chemicals and 55 related compounds) to the TSCA Priority Testing List. In addition, the ITC is removing 103 cadmium compounds and 14 High Production Volume (HPV) Challenge Program orphan chemicals from the Priority Testing List during this reporting period (June to November 2011). The ITC is adding the category of cadmium compounds and removing 103 cadmium compounds to provide a more comprehensive approach to assessing cadmium compounds' safety.

May 23, 2012 -- 77 FR 30856
NTP is testing (tris(chloropropyl) phosphate) (mixture of isomers). 13674-84-5
Final Rule 2017 and Later Model Year Light-Duty Vehicle Greenhouse Gas Emissions and Corporate Average Fuel Economy Standards EPA and NHTSA, on behalf of the Department of Transportation, are issuing final rules to further reduce greenhouse gas emissions and improve fuel economy for light-duty vehicles for model years 2017 and beyond. On May 21, 2010, President Obama issued a Presidential Memorandum requesting that NHTSA and EPA develop through notice and comment rulemaking a coordinated National Program to improve fuel economy and reduce greenhouse gas emissions of light-duty vehicles for model years 2017-2025, building on the success of the first phase of the National Program for these vehicles for model years 2012-2016. This final rule, consistent with the President's request, responds to the country's critical need to address global climate change and to reduce oil consumption. NHTSA is finalizing Corporate Average Fuel Economy standards for model years 2017-2021 and issuing augural standards for model years 2022-2025 under the Energy Policy and Conservation Act, as amended by the Energy Independence and Security Act. NHTSA will set final standards for model years 2022-2025 in a future rulemaking. EPA is finalizing greenhouse gas emissions standards for model years 2017-2025 under the Clean Air Act. These standards apply to passenger cars, light-duty trucks, and medium-duty passenger vehicles, and represent the continuation of a harmonized and consistent National Program. Under the National Program automobile manufacturers will be able to continue building a single light-duty national fleet that satisfies all requirements under both programs while ensuring that consumers still have a full range of vehicle choices that are available today. EPA is also finalizing minor changes to the regulations applicable to model years 2012-2016, with respect to air conditioner performance, nitrous oxides measurement, off-cycle technology credits, and police and emergency vehicles.

October 15, 2012 -- 77 FR 62624
National Toxicology Program Report on Carcinogens (ROC): acetaldehyde and naphthalene are reasonably anticipated to be human carcinogens; benzene, 1,3-butadiene and formaldehyde are known human carcinogens. 75-07-0
91-20-3
71-43-2
106-99-0
50-00-0
Proposed Addition of ortho-Nitrotoluene; Community Right-to-Know Toxic Chemical Release Reporting EPA is proposing to add ortho-nitrotoluene (o-nitrotoluene) to the list of toxic chemicals subject to reporting under section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA) of 1986 and section 6607 of the Pollution Prevention Act (PPA) of 1990. o-Nitrotoluene has been classified by the National Toxicology Program in their 12th Report on Carcinogens as “reasonably anticipated to be a human carcinogen.” EPA believes that o-nitrotoluene meets the EPCRA section 313(d)(2)(B) criteria because it can reasonably be anticipated to cause cancer in humans. Based on a review of the available production and use information, o-nitrotoluene is expected to be manufactured, processed, or otherwise used in quantities that would exceed the EPCRA section 313 reporting thresholds.

March 13, 2013 -- 78 FR 15913

National Toxicology Program Report on Carcinogens (ROC): o-Nitrotoluene is reasonably anticipated to be a human carcinogen.

88-72-2
Proposed Control of Air Pollution From Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards This action would establish more stringent vehicle emissions standards and reduce the sulfur content of gasoline beginning in 2017, as part of a systems approach to addressing the impacts of motor vehicles and fuels on air quality and public health. The proposed gasoline sulfur standard would make emission control systems more effective for both existing and new vehicles, and would enable more stringent vehicle emissions standards. The proposed vehicle standards would reduce both tailpipe and evaporative emissions from passenger cars, light-duty trucks, medium-duty passenger vehicles, and some heavy-duty vehicles. This would result in significant reductions in pollutants such as ozone, particulate matter, and air toxics across the country and help state and local agencies in their efforts to attain and maintain health-based National Ambient Air Quality Standards. Motor vehicles are an important source of exposure to air pollution both regionally and near roads. These proposed vehicle standards are intended to harmonize with California's Low Emission Vehicle program, thus creating a federal vehicle emissions program that would allow automakers to sell the same vehicles in all 50 states. The proposed vehicle standards would be implemented over the same timeframe as the greenhouse gas/fuel efficiency standards for light-duty vehicles, as part of a comprehensive approach toward regulating emissions from motor vehicles.

May 21, 2013 -- 78 FR 8500
National Toxicology Program Report on Carcinogens (ROC): acetaldehyde and naphthalene are reasonably anticipated to be human carcinogens; benzene, 1,3-butadiene and formaldehyde are known human carcinogens.  50-00-0
71-43-2
75-07-0
91-20-3
106-99-0
Proposed Guar Hydroxypropyltrimethylammonium Chloride; Exemption From the Requirement of a Tolerance This regulation establishes an exemption from the requirement of a tolerance for residues of guar hydroxypropyltrimethylammonium chloride (CAS Reg. No. 71329-50-5) when used as an inert ingredient (thickener/drift reduction agent) in pesticide formulations applied to growing crops. SciReg. Inc., on behalf of Rhodia Inc., submitted a petition to EPA under the Federal Food, Drug, and Cosmetic Act (FFDCA), requesting establishment of an exemption from the requirement of a tolerance. This regulation eliminates the need to establish a maximum permissible level for residues of guar hydroxypropyltrimethylammonium chloride.

May 29, 2013 -- 78 FR 12782
The National Toxicology Program conducted carcinogenicity studies in mice and rats.  No adverse effects were observed at doses up to 3,570 mg/kg/day. (TR-229). 9000-30-0
Proposed Formaldehyde Emissions Standards for Composite Wood Products EPA is proposing new requirements under the Formaldehyde Standards for Composite Wood Products Act, or Title VI of the Toxic Substances Control Act (TSCA). These proposed requirements are designed to implement the statutory formaldehyde emission standards for hardwood plywood, medium-density fiberboard, and particle board sold, supplied, offered for sale, or manufactured (including imported) in the United States. As directed by the statute, this proposal includes provisions relating to, among other things, laminated products, products made with no-added formaldehyde resins or ultra low-emitting formaldehyde resins, testing requirements, product labeling, chain of custody documentation and other recordkeeping requirements, enforcement, and product inventory sell-through provisions, including a product stockpiling prohibition. The composite wood product formaldehyde emission standards contained in TSCA Title VI are identical to the emission standards currently in place in California. This regulatory proposal implements these emissions standards and is designed to ensure compliance with the TSCA Title VI formaldehyde emission standards while aligning, where practical, with the regulatory requirements in California.

June 10, 2013 -- 78 FR 34820
National Toxicology Program Report on Carcinogens (ROC):  formaldehyde is known to be a human carcinogen. 50-00-0
Proposed Formaldehyde; Third-Party Certification Framework for the Formaldehyde Standards for Composite Wood Products The Formaldehyde Standards for Composite Wood Products Act (Title VI of the Toxic Substances Control Act (TSCA)) establishes formaldehyde emission standards for hardwood plywood, particle board, and medium-density fiberboard (composite wood products) and directs EPA to promulgate implementing regulations by January 1, 2013. Pursuant to the requirements of TSCA Title VI, EPA is proposing a framework for a TSCA Title VI Third-Party Certification Program for composite wood products. Under the framework, third-party certifiers (TPCs) would be accredited by EPA-recognized accreditation bodies (ABs) so that TPCs may certify composite wood product panel producers under TSCA Title VI. This proposed rule identifies the roles and responsibilities of the TPCs and ABs involved, as well as the criteria for participation in the TSCA Title VI Third-Party Certification Program. The Agency is proposing the TSCA Title VI Third-Party Certification Program framework prior to the rest of the TSCA Title VI implementing regulations in order to allow interested parties an opportunity to comment and to begin identifying the business practices and infrastructure that may need to be modified or developed in order to effectively participate in the program.

June 10, 2013 -- 78 FR 34796
National Toxicology Program Report on Carcinogens (ROC):  formaldehyde is known to be a human carcinogen. 50-00-0
Final Rule Addition of ortho-Nitrotoluene; Community Right-to-Know Toxic Chemical Release Reporting EPA is adding ortho-nitrotoluene (o-nitrotoluene) to the list of toxic chemicals subject to reporting under section 313 of the Emergency Planning and Community Right-to-Know Act (EPCRA) of 1986 and section 6607 of the Pollution Prevention Act (PPA) of 1990. o-Nitrotoluene has been classified by the National Toxicology Program in its 12th Report on Carcinogens as “reasonably anticipated to be a human carcinogen.” EPA has determined that o-nitrotoluene meets the EPCRA section 313(d)(2)(B) criteria because it can reasonably be anticipated to cause cancer in humans.

November 7, 2013 -- 78 FR 66848
National Toxicology Program Report on Carcinogens (ROC):  ortho-nitrotoluene reasonably anticipated to be a human carcinogen. 88-72-2
Final Rule Diflubenzuron; Pesticide Tolerances This regulation establishes tolerances for residues of diflubenzuron (N-[[(4-chlorophenyl)amino]carbonyl]-2,6-difluorobenzimide) in or on fruit, citrus, group 10-10 and citrus, oil. Chemtura Corporation, requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA).

January 31, 2014 -- 79 FR 5294
para-chloroaniline hydrochloride (PCA), a plant metabolite of diflubenzuron, tested positive for splenic tumors in male rats and hepatocellular adenomas/carcinomas in male mice. TR-351, 1989). 20265-96-7
Total Notices 270


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Food and Drug Administration
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Other Carcinogenic Chemicals in Food and Color Additives FDA ANPR on setting a policy for regulating use of food and color additives containing carcinogens.

April 2, 1982 -- 47 FR 14464
Reference to NIEHS report on species to species comparison of carcinogenicity data. N/A
Final Rule Irradiation of Food FDA final rule to permit irradiation of additional herbs, spices, and vegetable seasonings.

April 18, 1985 -- 50 FR 15415
FDA has referred USDA study to NTP for peer review. N/A
Final Rule Irradiation of Food FDA final rule to permit irradiation of dry or dehydrated enzyme preparations.

June 10, 1985 -- 50 FR 24190
NTP review, conducted at FDA's request, concluded that data did not demonstrate a carcinogenic response. N/A
Proposed Rule Certain Color Additives FDA proposed rule to postpone closing dates on provisional listing of certain color additives.

June 26, 1985 -- 50 FR 26377
NTP examined data on D Red Nos. 9 and 33 and concluded that there is a relationship between them that provides a basis for concern about the possible carcinogenicity of No. 33. (TR-225) 5160-02-1
Final Rule Irradiation of Food FDA final rule to permit gamma radiation of pork to control Trichinella Spiralis, citing NTP study which concluded that histopathological data did not show a carcinogenic response.

July 22, 1985 -- 50 FR 29658
NTP review, conducted at FDA's request, concluded that data did not demonstrate a carcinogenic response. N/A
Final Rule Certain Color Additives FDA final rule postponing closing dates for provisional listing of certain color additives to allow uninterrupted use while scientific evaluation continues.

September 4, 1985 -- 50 FR 35783
NTP found a clear relationship between D Red No. 9, which has indicated carcinogenic effects and D Red No. 33 that provides a basis for concern about the possible carcinogenicity of No. 33. (TR-225) 5160-02-1
Final Rule Cinnamyl Anthranilate FDA final rule prohibiting use in human food.

October 23, 1985 -- 50 FR 42929
NTP panel on Chemical Carcinogenesis Testing and Evaluation recommended continued use of the B55526 C55523 and F55521 mouse. 87-29-6
Proposed Rule Methylene Chloride FDA proposed rule to ban use in cosmetic products.

December 18, 1985 -- 50 FR 51551
NTP studies concluded that methylene chloride is a carcinogen in mice and can induce cancer at sites remote from the site of administration. (TR-306) 75-09-2
Final Rule Listing of D& C Orange No. 17 for Use in Externally Applied Drugs and Cosmetics FDA final rule permanently listing D Orange No. 17 as a color additive for use in externally applied drugs and cosmetics.

August 7, 1986 -- 51 FR 28331
NTP publication cited reporting 50% of 86 compounds tested by NTP between 7/81-7/84 were determined to induce some carcinogenic effect. N/A
Final Rule FD& C Yellow No. 6 FDA final rule permanently listing FD Yellow No. 6 for use in food, drugs, and cosmetics.

November 19, 1986 -- 51 FR 41765
"With the exception of the 1981 NCI/NTP bioassays that were done, the agency considered past studies as inadequate.." (TR-208) 2783-94-0
Final Rule D& C Red No. 8 and No. 9 FDA final rule permanently listing D Red No. 8 and No. 9 as color additives for use in lip products & externally applied drugs and cosmetics.

December 5, 1986 -- 51 FR 43877
This regulation, based on a deminimus interpretation of the Delaney Clause was revoked following a federal court ruling. 5160-02-1
Final Rule Indirect Food Additives FDA final rule allowing use of an additive to paper products which come into contact with food, although the additive may contain minute amounts of methylene chloride as a byproduct of its production.

May 27, 1987 -- 52 FR 19722
NTP-supported study of methylene chloride showed carcinogenicity in male and female mice. TR-306. 75-09-2
Final Rule Cancer-Causing Residues in Edible Products of Food-Producing Animals FDA final rule on procedures and criteria to ensure absence of such residues in animals to which drugs, food additives, or color additives have been administered.

December 31, 1987 -- 52 FR 49572
References to NTP report on chemical carcinogenesis testing and evaluation. N/A
Notice D& C Red No. 8 and D& C Red No. 9 FDA notice of denial of petition for listing for use in ingested lip products and in externally applied drugs and cosmetics.

July 15, 1988 -- 53 FR 26886
NCI/NTP chronic rat study concluded that D Red No. 9 is carcinogenic for male F-344 rats. (TR-225) 5160-02-1
Final Rule D& C Red No. 36 FDA final rule permanently listing D Red No. 36 for general use except in eye area.

August 2, 1988 -- 53 FR 29024
At FDA's request, NTP compared data on D Red No. 33 with D Red No. 9, a splenic carcinogen. (Nos. 33 and 36 were being considered jointly). (TR-225) 5160-02-1
Final Rule Dimethyl Dicarbonate FDA final rule amending food additive regulations to allow use as yeast inhibitor in wines.

October 21, 1988 -- 53 FR 41325
NTP carcinogenesis bioassay of methyl carbamate which is produced in food by dimethyl dicarbonate. (TR-328) 598-55-0
Final Rule Methylene Chloride (75-09-2) FDA final rule banning use of methylene chloride as an ingredient of cosmetic products.

June 29, 1989 -- 54 FR 27328
NTP concluded with respect to their inhalation study on methylene chloride that there was clear evidence of carcinogenicity in mice and female rats and some evidence of carcinogenicity in male rats. 75-09-2
Final Rule 4,4'-Diphenylmethanediamine FDA final rule amending food additive regulations to allow use of polyamide-imide resins in articles which come into contact with food.

October 23, 1989 -- 54 FR 43168
Data from NTP carcinogenesis bioassay used to estimate upper-bound level of lifetime risk from proposed use of 4,4'-diiphenylmethanediamine. N/A
Notice Urethane in Alcoholic Beverages; Research and Survey Reports The FDA announced the availability of research and survey reports on urethane in alcoholic beverages.

March 23, 1990 -- 55 FR 10816
The FDA asked NTP to initiate research to provide the toxicology data necessary to estimate the risk from urethane in alcoholic beverages. 51-79-6
Proposed Rule General and Plastic Surgery Devices; Effective Date of Requirement for Premarket Approval of Silicone Gel-filled Breast Prosthesis. FDA is proposing to require the filing of a premarket approval application for the silicone gel-filled breast prosthesis.

May 17, 1990 -- 55 FR 20568
Any PMA must include acute, subchronic, and chronic toxicity in vitro and in vivo studies. These studies should include a separate assessment of the carcinogenic risk for each substance contained in the implant. Studies should be performed in accordance with the guide-lines issued by the NTP for all aspects of conducting the assay. N/A
Proposed Rule Topical Acne Drug Products for Over-The Counter Human Use; Amendment of Tentative Final Monograph Proposed Rule: Amendment to final monograph for over-the counter topical acne products. This amendment reclassifies the topical acne active ingredient benzoyl peroxide to a "more-data-needed" category.

August 7, 1991 -- 56 FR 37622
Reference to NTP Init-Prom Comparative Mouse Study using different combinations of initiators and promoters including benzoyl peroxide. (TR-441) INIT/PROM
Final Rule Indirect Food Additives: Polymers The FDA is amending the food additive regulations to provide for the safe use of polyestercarbonate resin.

February 3, 1992 -- 57 FR 3938
Residual amounts of methylene chloride have been found in the additive. The FDA estimated the worst-case exposure to methylene chloride from the use of polyestercarbonate resin food-contact articles to be less than 15 micrograms per person per day. The FDA used data from TR-306 to estimate the upper-bound limit of lifetime human risk exposure to methylene chloride. 75-09-2
Final Rule Indirect Food Additives: Paper and Paperboard Components The FDA is amending the food additive regulations to provide for the safe use of ethyl acrylate in the manufacture of paper and paperboard intended for use in contact with food.

August 7, 1992 -- 57 FR 34865
The FDA used data from TR-259 on ethyl acrylate to estimate the upper-bound limit of lifetime human risk from exposure. 140-88-5
Tentative Final Rule Pesticide Tolerance and Animal Feed Additive Regulation for Fluoride Compounds Tentative Final Rule: Tentative affirmation that gelatin is generally recognized as safe (GRAS) for use as a direct human food ingredient.

May 12, 1993 -- 58 FR 27959
Data from the NTP toxicology and carcinogenesis study on pentachlorophenol (TR-349) showing PCP induces carcinogenic neoplasms in mice was used in modifying the regulation to state that there shall be no detectable levels of PCP in gelatin when tested by the method referenced in this regulation. 87-86-5
Final Rule Indirect Food Additives: Adjuvants, Production Aids, and Sanitizers Amendment of food additive regulations to provide for the safe use of 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid triester with 1,3,5-tris(2-hydroxyethyl)-s-triazine-2,4,6-(1H,3H,5H)-trione as an antioxidant for polyester elastomers in contact with dry food and rubber articles intended for repeated use in contact with food.

January 19, 1994 -- 59 FR 2733
Because ethyl acrylate may be present in the additive, data from the NTP toxicology and carcinogenesis study on ethyl acrylate (TR-259) were used to estimate the upper-bound limit of lifetime human risk. 140-88-5
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption; Dimethyl Dicarbonate Amendment to the food additive regulations to provide for the safe use of dimethyl dicarbonate as a yeast inhibitor in dealcoholized and low alcohol wines, Jan 26, 1993, and in ready-to-drink tea beverages.

February 4, 1994 -- 59 FR 5317
NTP toxicology and carcinogenesis study on methyl carbamate (TR-328) was used to estimate the human cancer risk from the potential exposure to methyl carbamate stemming from the proposed use of dimethyl dicarbonate as a yeast inhibitor in wine. 598-55-0
Proposed Rule Oral Health Care Drug Products for Over-the-Counter Human Use; Tentative Final Monograph for Oral Antiseptic Drug Products Notification of proposed rulemaking in the form of a tentative final monograph that would establish conditions under which over-the-counter oral antiseptic drug products are generally recognized as safe and effective and not misbranded.

February 9, 1994 -- 59 FR 6084
The FDA noted that benzethonium chloride is currently being evaluated for carcinogenic potential by the NTP. The agency also nominated gentian violet for study by the NTP after reviewing the available data and deciding that a definitive conclusion regarding its carcinogenic activity could not be reached. (TR-438) 121-54-0
Final Rule Secondary Direct Food Additives Permitted in Food for Human Consumption: Cellulose Triacetate Amendment of food additive regulations to provide for the safe use of cellulose triacetate as an immobilizing agent for lactase for use in reducing the lactose content of milk.

July 20, 1994 -- 59 FR 36935
Data from the NTP toxicology and carcinogenesis study of dichloromethane (TR-306) was used to calculate the risk from exposure to dichloromethane as an impurity in cellulose triacetate. 75-09-2
Notice International Conference on Harmonisation; Draft Guideline on Specific Aspects of Regulatory Genotoxicity Tests; Availability Notification of publication of draft guideline "Notes for Guidance on Specific Aspects of Regulatory Genotoxicity Tests" to provide guidance on genotoxicity testing.

September 22, 1994 -- 59 FR 48734
The test battery approach is designed to reduce the risk of false negative results. However, genotoxicity test batteries as described will only detect carcinogens that act primarily via a mechanism involving direct genetic damage. According to results of the NTP (Haseman, et al, 1990), approximately 15 percent of carcinogens are not detected by the commonly used batteries of genotoxicity tests. N/A
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption; Acesulfame Potassium Methylene chloride is used as a solvent in the initial step in the manufacturing process of acesulfame potassium and may be present as an impurity in the additive. The FDA used risk assessment procedures to estimate the upper-bound limit of risk presented by methylene chloride.

December 1, 1994 -- 59 FR 61538
The FDA used data from the NTP bioassay on methylene chloride to calculate the potency, or unit risk, from exposure to this chemical. TR-306 75-09-2
Proposed Rule Gastroenterology-Urology Devices; Effective Date of the Requirement for Premarket Approval of the Implanted Mechanical/Hydraulic Urinary Continence Device The FDA is proposing to require the filing of a premarket approval application for a medical device. The Agency is also summarizing its proposed findings regarding the degree of risk of illness or injury designed to be eliminated or reduced.

February 15, 1995 -- 60 FR 8595
The FDA used the NTP bioassay on 4,4-Methylenedianiline Dihydrochloride in their evaluation of potential risk of polyurethane elastomer materials which may be present in the devices and may degrade over time and release degradation products which are potential carcinogens in animals. (TR-248) 13552-44-8
Final Rule Dichlorvos; Notice of Preliminary Determination to Cancel Certain Registrations and Draft Notice of Intent to Cancel The FDA is amending the food additive regulations to provide for the safe use of C.I. Pigment Yellow 138 as a colorant for all food-contact polymers. In its evaluation of the safety of this additive, the FDA has reviewed the safety of the additive itself and that of polychlorinated dibenzo-p-dioxins (PCDD) impurities resulting from the manufacturing process.

January 25, 1996 -- 61 FR 2113
An independent pathology review analyzed slides of the liver tumors observed in the bioassay of TCDD using the NTP's 1986 classification system for liver tumors. The FDA used this classification to estimate carcinogenic risk. N/A
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption: Olestra The FDA is amending the food additive regulations to provide for the safe use of sucrose esterified with medium and long chain fatty acids (olestra) as a replacement for fats and oils.

January 30, 1996 -- 61 FR 3117
The FDA used data from the NTP historical pathology database to support its rationale that there was no association between treatment with olestra and the incidence of leukemia developed by male rats during a 2-year carcinogenicity study. N/A
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption: Olestra The Food and Drug Administration (FDA) is amending the food additive regulations to provide for the safe use of polyaryletherketone resins as a basic resin for use in food-contact materials. Although the additive itself has not been shown to cause cancer, it has been found to contain minute amounts of methylene chloride, which is a carcinogenic impurity resulting from the manufacture of the additive.

August 15, 1996 -- 61 FR 42379
The FDA used data from the NTP Bioassay on Methylene Chloride (TR-306) to estimate the upper-bound limit of lifetime human risk from exposure resulting from the proposed use of this additive. And, based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to methylene chloride would result from the proposed use of the additive. 75-09-2
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption: Olestra The Food and Drug Administration (FDA) is amending the food additive regulations to provide for the safe use of phosphorylated tall oil fatty acids as pigment dispersants in polymeric films intended for use in contact with food. Although the additive itself has not been shown to cause cancer, it has been found to contain minute amounts of dimethyl hydrogen phosphite, which is a carcinogenic impurity resulting from the manufacture of the additive.

August 21, 1996 -- 61 FR 43156
The FDA used the data from the NTP Bioassay on Dimethyl Hydrogen Phosphite (TR-287) to estimate the upper-bound limit of lifetime human risk from exposure resulting from the proposed use of the additive.  And, based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to dimethyl hydrogen phosphite would result from the proposed use of the additive. N/A
Final Rule Indirect Food Additives: Polymers The Food and Drug Administration (FDA) is amending the food additive regulations to provide for the safe use of a copolymer of ethyl acrylate, methyl methacrylate, and methacrylamide in combination with melamine-formaldehyde resin as a coating for polyethylene phthalate films intended for use in contact with food. Although the additive itself has not been shown to cause cancer, it has been found to contain minute amounts of unreacted ethyl acrylate, which is a carcinogenic impurity resulting from the manufacture of the additive.

September 5, 1996 -- 61 FR 46719
The FDA used the data from the NTP Bioassay on Ethyl Acrylate (TR-259) to estimate the upper-bound limit of lifetime human risk from exposure resulting from the proposed use of the additive. And, based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to ethyl acrylate would result from the proposed use of the additive. 140-88-5
Final Rule Indirect Food Additives: Adjuvants, Production Aids, and Sanitizers Final Rule: The Food and Drug Administration (FDA) is amending the food additive regulations to provide for the safe use of 1,2-benzisothiazolin-3-one as a biocide in rubber latex for use in the manufacture of rubber articles intended for repeated use in contact with food. In its evaluation of the safety of this additive, the FDA has reviewed the safety of the additive itself and that of polychlorinated dibenzo-p-dioxins (PCDD) and dibenzo-p-dioxins impurities resulting from the manufacturing process.

November 29, 1996 -- 61 FR 231
An independent pathology review reanalyzed slides of the liver tumors observed in a bioassay of TCDD using the NTP's 1986 classification system for liver tumors. The FDA used this classification to estimate carcinogenic risk. N/A
Proposed Rule Laxative Drug Products for Over-the-Counter Human Use: Proposed Amendment to the Tentative Final Monograph As part of its ongoing review of OTC drug products, the FDA is proposing to amend the tentative final monograph for over-the-counter laxative drug products by reclassifying phenolphthalein from Category I (generally recognized as safe and effective) to Category II (not generally recognized as safe and effective).

September 2, 1997 -- 62 FR 46223
Based on the results of NTP studies, the FDA considers use of phenolphthalein a potential risk to humans. The NTP findings of rodent carcinogenicity and genotoxicity in several test systems indicate that chronic use of phenolphthalein could lead to damage to the human genome and could increase the risk of malignancy. 77-09-8
Final Rule Indirect Food Additives: Adjuvants, Production Aids, and Sanitizers The FDA is amending the food additive regulations to provide for the safe use of 2,9-dichloro-5,12-dihydroquinone[2,3-b]acridine-7,14-dione (C.I. Pigment Red 202) as a colorant for polymers used in contact with food. Although the additive itself has not been shown to cause cancer, it has been found to contain minute amounts of para-chloroaniline, a carcinogenic impurity resulting from the manufacture of the additive.

November 3, 1998 -- 63 FR 59213
The FDA used data from the NTP carcinogenicity study of para-Chloroaniline Hydrochloride (TR-351) to estimate the upper-bound limit of lifetime human risk from exposure resulting from the proposed  use of the additive. And, based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to para-chloroaniline would result from the proposed use of the additive N/A
Final Rule Diflubenzuron; Pesticide Tolerances The FDA is issuing a final rule establishing that the over-the-counter stimulant laxative ingredients danthron and phenolphthalein are not generally recognized as safe and effective and are misbranded.

January 29, 1999 -- 64 FR 4535
After reviewing all of the available data, including the NTP phenolphthalein studies, the FDA concluded that phenolphthalein caused chromosome aberrations, cell transformation, and mutagenicity in mammalian cells and is reasonably anticipated to have human carcinogenic potential. TR 465: Toxicology and Carcinogenesis Studies of Phenolphthalein in F344/N Rats and B6C3F1 Mice (Feed Studies) Dunnick JK et al.,; Phenolphthalein Induces Thymic Lymphomas Accompanied By Loss Of The P53 Wild Type Allele In Heterozygous P53-Deficient (+/-) Mice,; Toxicologic Pathology 1997, 25(6): 533-540. N/A
Final Rule Diflubenzuron; Pesticide Tolerances The FDA is amending the food additive regulations to provide for the safe use of 4,5-dichloro-1,2-dithiol-3-one as a slimicide in the manufacture of food-contact paper and paperboard. Although the additive itself has not been shown to cause cancer, it has been found to contain minute amounts of tetrachloroethylene, a carcinogenic impurity resulting from the manufacture of the additive

December 15, 1999 -- 64 FR 69898
The FDA used data from the NTP Carcinogenicity Study of Tetrachloroethylene (TR-311), to estimate the upper-bound limit of lifetime human risk from exposure resulting from the use of the additive. And based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to tetrachloroethylene would result from the proposed use of the additive. 127-18-4
Final Rule Vinclozolin; Pesticide Tolerances The FDA is amending the food additive regulations to provide for the safe use of hydrogenated butadiene/acrylonitrile copolymers intended for contact with food in repeated use applications. Although the additive itself has not been shown to cause cancer, it has been found to contain residual amounts of acrylonitrile and butadiene, carcinogenic impurities resulting from the manufacture of the additive.

November 15, 2000 -- 65 FR 68888
The FDA used data from the NTP Carcinogenicity Study of 1,3-Butadiene, (TR-434), to estimate the upper-bound limit of lifetime human risk from exposure resulting from the use of the additive. And based on its estimates of worst case exposure, the FDA concluded that there is reasonable certainty that no harm from exposure to butadiene would result from the proposed use of the additive. 106-99-0
Notice International Conference on Harmonisation; Draft Recommendations for the Revision of the Permitted Daily Exposures for Two Solvents, N-Methylpyrrolidone and Tetrahydrofuran. The Food and Drug Administration is announcing the availability of draft recommendations for the revision of the permitted daily exposures (PDE) for n-methylpyrrolidone and tetrahydrofuran.

February 12, 2002 -- 67 FR 6542
Based on data from NTP Carcinogenicity Studies of Tetrahydrofuran, (TR-475), the ICH Steering Committee recommended that tetrahydrofuran be moved from class 3 into class 2. 109-99-9
Final Rule New Animal Drugs: Phenylbutazone; Extralabel Animal Drug Use; Order of Prohibition The FDA is prohibiting the extralabel use of phenylbutazone animal and human drugs in female dairy cattle 20 months of age or older. The extralabel use presents a risk to the public health.

February 28, 2003 -- 68 FR 9528
The FDA has determined that the extralabel use of phenylbutazone presents a risk to the public health. The FDA's conclusion is based on available toxicology data including data from the NTP Toxicology and Carcinogenesis Studies of Phenylbutazone (TR-367) and the NTP genotoxicity tests. 50-33-9
Notice International Conference on Harmonisation; Draft Recommendations for the Revision of the Permitted Daily Exposures for Two Solvents, N-Methylpyrrolidone and Tetrahydrofuran. The FDA is proposing a rule that would establish conditions under which over-the-counter drug products for the reduction or prevention of dental plaque and gingivitis are generally recognized as safe and effective and not misbranded.

May 29, 2003 -- 68 FR 32232
The NTP 13-week Stannous Chloride studies were used to develop the existing safety factor for potential exposure to Stannous salts from use of a dentifrice containing stannous fluoride. (TR-231) 7772-99-8
Final Rule Final Rule Declaring Dietary Supplements Containing Ephedrine Alkaloids Adulterated Because They Present an Unreasonable Risk Final Rule Declaring Dietary Supplements Containing Ephedrine Alkaloids Adulterated Because They Present an Unreasonable Risk

February 11, 2004 -- 69 FR 6787
One comment objected that animal studies using ephedrine alkaloids to evaluate the safety of ephedrine alkaloids as dietary ingredients were not considered in the evaluation and cited the results of the National Toxicology Program's long term rodent studies on ephedrine (TR-307). 134-72-5
Notice Furan in Food, Thermal Treatment; Request for Data and Information The FDA is requesting the submission of data and information on furan, a heat treatment related byproduct that has been detected in certain thermally treated foods.

May 10, 2004 -- 69 FR 25911
Results from the NTP bioassay on furan (TR-402) showed clear evidence of carcinogenic activity in both rats and mice. Cytotoxic and carcinogenic effects were seen at all doses, and a no adverse effect level was not identified. The FDA would like to acquire data on the effects of furan doses lower than those used in the NTP study. 110-00-9
Notice Guidance for Industry: Labeling for Topically Applied Cosmetic Products Containing Alpha Hydroxy Acids as Ingredients; Availability The Food and Drug Administration (FDA) is announcing the availability of a guidance document entitled "Guidance for Industry: Labeling for Topically Applied Cosmetic Products Containing Alpha Hydroxy Acids as Ingredients." The guidance recommends content for a labeling statement for cosmetic products containing alpha hydroxy acids (AHAs) as ingredients.

January 10, 2005 -- 70 FR 1721
Publication of this guidance is an interim measure while FDA continues to review the data on the effects of AHA-containing products on skin sensitivity to UV radiation, including a photocarcinogenicity study by the National Toxicology Program's Center for Phototoxicology and recent studies published in peer-reviewed journals. FDA invites comments to continue to inform FDA of new studies when they become available. (TR-524) 79-14-1 and 69-72-7
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption; Acacia (Gum Arabic) The Food and Drug Administration (FDA) is amending the food additive regulations to provide for the safe use of acacia (gum arabic) as a thickener, emulsifier, or stabilizer in alcoholic beverages at a maximum use level of 20 percent. This action is in response to a petition filed by Kerry, Inc.

February 17, 2005 -- 70 FR 8032
FDA conducted literature searches that updated the information that had formed the basis of the Select Committee report. The agency reviewed toxicological data from a 1982 National Toxicology Program (NTP) report of 2-year carcinogenicity feeding studies on acacia in F344 rats and B6C3F1 mice. The agency evaluated the carcinogenicity of acacia and concluded that F344 rats and B6C3F1 mice consuming diets containing up to 5-percent acacia for 2 years showed no increased incidences of tumors at any site. (TR-227) 9000-01-5
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption; Synthetic Fatty Alcohols The Food and Drug Administration (FDA) is amending the food additive regulations to provide for the safe use of n-octanol (n-octyl alcohol) produced by a new manufacturing process, the hydrodimerization of 1,3-butadiene. This action is in response to a petition filed by Kuraray International Corp.

December 8, 2005 -- 70 FR 72906
The following references have been placed on display in the Division of Dockets Management (see ADDRESSES) and may be seen by interested persons between 9 a.m. and 4 p.m., Monday through Friday. "Toxicology and Carcinogenesis Studies of 1,3-Butadiene (CAS No. 106-99-0) in B6C3F1 Mice (Inhalation Studies)," National Toxicology Program. (TR-434) 106-99-0
Proposed Skin Bleaching Drug Products For Over-the-Counter Human Use; Proposed Rule The Food and Drug Administration is issuing a notice of proposed rulemaking that would establish that over-the-counter (OTC) skin bleaching drug products are not generally recognized as safe and effective (GRASE) and are misbranded. FDA is also withdrawing the previous proposed rule on skin bleaching drug products for OTC human use, which was issued in the form of a tentative final monograph (TFM). FDA is issuing this proposed rule after considering new data and information on the safety of hydroquinone, the only active ingredient that had been proposed for inclusion in a monograph for these products. This proposal is part of FDA's ongoing review of OTC drug products. Further, upon issuance of a final rule, FDA intends to consider all skin bleaching drug products, whether currently marketed on a prescription or OTC basis, to be new drugs requiring an approved new drug application (NDA) for continued marketing.

August 29, 2006 -- 71 FR 51146
Toxicology and carcinogenesis studies on orally administered hydroquinone conducted under the support of the National Toxicology Program (NTP) (Refs. 1 and 2) have indicated "some evidence" of carcinogenicity in male and female rats and in female mice. FDA's Center for Drug Evaluation and Research (CDER) Carcinogenicity Assessment Committee (CAC) has evaluated the design, results, and NTP interpretation of these studies, and concurs with the NTP's assessment. (TR-366) 123-31-9 and 497-76-7
Notice Acrylamide in Food; Request for Comments and for Scientific Data and Information The Food and Drug Administration (FDA) is requesting comments and scientific data and information on acrylamide in food. Acrylamide is a chemical that can form in some foods during certain types of high-temperature cooking. FDA is seeking information on practices that manufacturers have used to reduce acrylamide in food and the reductions they have been able to achieve in acrylamide levels. FDA is considering issuing guidance for industry on reduction of acrylamide levels in food products.

August 26, 2009 -- 74 FR 43134
Under the sponsorship of the National Toxicology Program, FDAs National Center for Toxicological Research (NCTR) embarked in 2002 on a series of new toxicology assays for acrylamide. These studies were designed to address deficiencies in earlier carcinogenicity studies and to provide more reliable data on potential carcinogenic risk of acrylamide and other potential effects of acrylamide exposure. The work at NCTR includes long-term carcinogenicity bioassays of acrylamide and its metabolite glycidamide in mice and rats, as well as toxicokinetic, bioavailability, mutagenicity, and neurodevelopmental studies. NCTRs work also includes the development of a physiologically based pharmacokinetic model for acrylamide and glycidamide. (Acrylamide) (Glycidamide ) 79-06-1
5694-00-8
Notice Office of the Commissioner Reorganization; Statement of Organizations, Functions, and Delegations of Authority The Food and Drug Administration (FDA) is announcing the reorganization of the Office of the Commissioner (OC). This reorganization includes the organizations and their substructure components as listed in this document. This notice was previously published in the Federal Register of August 18, 2009, but it contained several errors. For the convenience of the reader, the reorganization is published again in its entirety.

February 19, 2010 -- 75 FR 7490
Office of Science: Serves as principal authority and provides leadership for the Center’s participation in the National Toxicology Program (NTP). NA
Notice Food Additives; Bisphenol A; Availability The Food and Drug Administration (FDA) announces the availability of five documents related to FDA’s continuing assessment of Bisphenol A (BPA) and solicits public comments on the four documents prepared by FDA’s Center for Food Safety and Applied Nutrition (CFSAN). These documents do not represent an agency opinion or position on BPA, on which an interim update was recently provided. (See http://www.fda.gov/NewsEvents/PublicHealthFocus/ucm064437.htm). Rather, these documents provide perspectives and opinions that are being considered by FDA as it continues its safety assessment of BPA. This action will enable FDA to consider comments from the public in its assessment of BPA for food contact applications.

April 5, 2010 -- 75 FR 17145
National Toxicology Program, Center for the Evaluation of Risks to Human Reproduction. NTP–CERHR Monograph on the Potential Human Reproductive and Developmental Effects of Bisphenol A. NIH Publication No. 08–5994. September 2008. Accessible at: http://cerhr.niehs.nih.gov/evals/bisphenol/bisphenol.pdf. (Bisphenol A) 80-05-7
Final Rule Labeling and Effectiveness Testing; Sunscreen Drug Products for Over-the-Counter Human Use The Food and Drug Administration (FDA) is issuing this document to address labeling and effectiveness testing for certain over-the-counter (OTC) sunscreen products containing specified active ingredients and marketed without approved applications. This document addresses labeling and effectiveness testing issues raised by the nearly 2,900 submissions that we received in response to the sunscreen proposed rule of August 27, 2007 (2007 proposed rule). The document also identifies specific claims that render a product that is subject to this rule misbranded or would not be allowed on any OTC sunscreen product marketed without an approved application. The document does not address issues related to sunscreen active ingredients or certain other issues regarding the GRASE determination for sunscreen products. The document requires OTC sunscreen products to comply with the content and format requirements for OTC drug labeling contained in the 1999 Drug Facts final rule (published in the Federal Register of March 17, 1999, by lifting the delay of implementation date for that rule that we published on September 3, 2004).

June 17, 2011 -- 76 FR 35620
The Report on Carcinogens indicates that UVA and UVB radiation across the spectrum are known human carcinogens, but either UVA or UVB radiation alone is reasonably anticipated to be a human carcinogen. Cited in the National Toxicology Program’s Report on Carcinogens. (ROC) N/A
Notice International Conference on Harmonisation; Final Recommendation for the Revision of the Permitted Daily Exposure for the Solvent Cumene According to the Maintenance Procedures for the Guidance Q3C Impurities: Residual Solvents; Availability The Food and Drug Administration (FDA) is announcing the availability of a final recommendation for the revision of the permitted daily exposure (PDE) for the solvent cumene according to the maintenance procedures for the guidance for industry entitled “Q3C Impurities: Residual Solvents.” The recommendation was prepared under the auspices of the International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH).

February 23, 2012 -- 77 FR 10754
NTP Work Cited: NTP 2-year rodent bioassay of cumene showed clear evidence of carcinogenicity (TR-452). 98-82-8
Notice Harmful and Potentially Harmful Constituents in Tobacco Products and Tobacco Smoke; Established List The Food and Drug Administration (FDA) is establishing a list of harmful and potentially harmful constituents (HPHCs) in tobacco products and tobacco smoke (the established HPHC list) as required by the Federal Food, Drug, and Cosmetic Act (the FD&C Act).

April 3, 2012 -- 77 FR 20034
For establishing the list of harmful and potentially harmful constituents in tobacco products and smoke, part of the criteria used were constituents identified by the National Toxicology Program as known or probable human carcinogens. N/A
Final Rule Food Additives Permitted for Direct Addition to Food for Human Consumption; Acacia (Gum Arabic) The Food and Drug Administration (FDA) is amending the food additive regulations to provide for the expanded safe use of acacia (gum arabic) in foods. This action is in response to a petition filed by Nexira.

December 6, 2013 -- 78 FR 73434
Carcinogenesis Bioassay of Gum Arabic (CAS No. 9000-01-5) in F344 Rats and B6C3F1 Mice (Feed Study). Under the conditions of this bioassay, gum arabic was not carcinogenic for F344 rats or B6C3F1 mice of either sex.  (TR-227, 1982). N/A
Proposed Safety and Effectiveness of Consumer Antiseptics; Topical Antimicrobial Drug Products for Over-the-Counter Human Use; Proposed Amendment of the Tentative Final Monograph; Reopening of Administrative Record. The Food and Drug Administration (FDA) is issuing this proposed rule to amend the 1994 tentative final monograph or proposed rule (the 1994 TFM) for over-the-counter (OTC) antiseptic drug products. In this proposed rule, we are proposing to establish conditions under which OTC consumer antiseptic products intended for use with water (referred to throughout as consumer antiseptic washes) are generally recognized as safe and effective. In the 1994 TFM, certain antiseptic active ingredients were proposed as being safe for antiseptic handwash use by consumers based on safety data evaluated by FDA as part of our ongoing review of OTC antiseptic drug products. However, in light of more recent scientific developments and changes in the use patterns of these products we are now proposing that additional safety data are necessary to support the safety of antiseptic active ingredients for this use. We also are proposing that all consumer antiseptic wash active ingredients have data that demonstrate a clinical benefit from the use of these consumer antiseptic wash products compared to nonantibacterial soap and water.

December 17, 2013 -- 78 FR 76444
Toxicology and Carcinogenesis Studies of 4-Hexylresorcinol (CAS No. 136-77-6) in F344/N Rats and B6C3F1 Mice (Gavage Studies).  Under the conditions of these 2-year gavage studies, there was no evidence of carcinogenic activity of 4-hexylresorcinol for male or female F344/N rats.  There was equivocal evidence of carcinogenic activity of 4-hexylresorcinol for male B6C3F1 mice.  There was no evidence of carcinogenic activity for female B6C3F1 mice.  (TR-330, 1988). 136-77-6
Total Notices 59


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Mine Safety and Health Administration
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Proposed Rule Lead MSHA proposed rule to revise standards for air quality and chemical substances in mines.

August 29, 1989 -- 54 FR 35760
NTP recommendation that lead oxide and lead sulfide be ranked a high priority for acute toxicity studies cited in support of proposed lead exposure standard. 1317-36-8
1314-87-0
Final Rule Diesel Particulate Matter Exposure of Underground Coal Miners The Department of Labor is establishing new health standards for underground coal mines that use equipment powered by diesel engines. High concentrations of diesel particulate matter (DPM) increases the risk of serious health hazards in underground mines.

January 19, 2001 -- 66 FR 5525
The NTP is listed as one of many scientific organizations and governmental agencies that has reviewed the available epidemiologic and toxicological evidence for carcinogenicity and has identified dpm as a probable human carcinogen. (9th Report on Carcinogens) N/A
Proposed Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Miners The Department of Labor is proposing revising the existing diesel particulate matter (DPM) interim concentration limit.

August 14, 2003 -- 68 FR 48668
A published review of the particulate inhalation studies conducted by the NTP was used to update the toxicological effects of DPM exposure. N/A
Final Rule Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Miners In this final rule: MSHA revises the existing standards addressing diesel particulate matter (DPM) exposure in underground metal and nonmetal (M/NM) mines; changes the interim concentration limit measured by total carbon to a comparable permissible exposure limit measured by elemental carbon, which renders a more accurate DPM exposure measurement; increases flexibility of compliance for mine operators by requiring longstanding hierarchy of controls for its other exposure-based health standards at M/NM mines, but retains the prohibition on rotation of miners for compliance; requires MSHA to consider economic as well as technological feasibility in determining if operators qualify for an extension of time in which to meet the final DPM limit; deletes the requirement for a control plan; and makes conforming changes to existing provisions concerning compliance determinations, environmental monitoring and recordkeeping.

June 6, 2005 -- 70 FR 32868
Moyer, et al. review of NTP data from 90-day and 2-yr exposures of particulates and use of mouse inhalation model and the NTP 10th edition of the Report on Carcinogens are cited in the MSHA revision of existing standards addressing diesel particulate matter (DPM) exposure in underground metal and nonmetal (M/NM) mines. (ROC)
N/A
Proposed Asbestos Exposure Limit MSHA is proposing to revise their existing health standards for asbestos exposure at metal and nonmetal mines, surface coal mines, and surface areas of underground coal mines. The proposed rule would reduce the full-shift permissible exposure limit and the excursion limit for airborne asbestos fibers, and make several nonsubstantive changes to add clarity to the standard. Exposure to asbestos has been associated with lung and other cancers, mesotheliomas, and asbestosis. This proposed rule would help assure that fewer miners who work in an environment where asbestos is present would suffer material impairment of health or functional capacity over their working lifetime.

July 29, 2005 -- 70 FR 43950
There have been increasing numbers of studies on asbestos and its hazards over the past 40 years. These efforts encompass government, industry, and academia on a local, national, and international scale. Government agencies and scientific groups in the United States, such as the National Institute for Occupational Safety and Health (NIOSH), the Agency for Toxic Substances and Disease Registry (ATSDR), the American Conference of Governmental Industrial Hygienists (ACGIH), and the National Toxicology Program (NTP), have addressed issues involving carcinogens, such as asbestos. 1332-21-4
Final Rule Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Miners This final rule revises the May 20, 2006 effective date of the diesel particulate matter (DPM) final concentration limit of 160 micrograms of total carbon (TC) per cubic meter of air (160TC ug/m3) promulgated in the 2001 final rule "Diesel Particulate Matter Exposure of Underground Metal and Nonmetal Miners," and published in the Federal Register on January 19, 2001 (66 FR 5706) and amended on September 19, 2005 (70 FR 55019).

May 18, 2006 -- 71 FR 28924
In the 10th edition of its Report on Carcinogens, the National Toxicology Program (NTP) of the National Institutes of Health formally retained its designation of diesel exhaust particulates as "reasonably anticipated to be a human carcinogen." (U.S. Dept. of Health and Human Services, 2002). (ROC)

Although many commenters agreed that the adverse health effects associated with miners' exposure to DPM warranted an exposure limit, commenters from trade associations and industry continued to challenge the conclusions of the 2001 risk assessment. Discussions addressing this issue were summarized in the 2001 risk assessment and the 2005 update. As referenced in this section, the U.S. Environmental Protection Agency, World Health Organization, and the National Toxicology Program regard DPM exposure as adversely affecting human health.
N/A
Total Notices 6


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National Institute for Occupational Safety and Health
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Notice Request for Information on 1-Bromopropane The National Institute for Occupational Safety and Health (NIOSH) of the Centers for Disease Control and Prevention (CDC) intends to evaluate the scientific data on the brominated organic solvent, 1-Bromopropane (1–BP, CAS # 106–94–5, also known as n-propyl bromide), and develop appropriate communication documents, such as a Current Intelligence Bulletin, Criteria Document and/or other informational products, and establish a Recommended Exposure Limit (REL) for 1–BP. NIOSH is requesting information on the following: (1) published and unpublished reports and findings from in vitro and in vivo toxicity studies with 1–BP, (2) information on possible health effects observed in workers exposed to 1–BP, (3) information on workplaces and products in which 1–BP can be found, (4) description of work tasks and scenarios with a potential for exposure to 1–BP, (5) workplace exposure data, and (6) information on control measures (e.g., engineering controls, work practices, personal protective equipment) that are being used in workplaces where potential exposures to 1–BP occur.

September 16, 2009 -- 74 FR 47593
The National Toxicology Program (NTP) estimated that approximately 8.2 million pounds (lbs) of 1–BP were used in the United States (U.S.) in 2002. Estimates of the number of workers exposed to 1–BP are unavailable due to limited exposure data and its relatively recent introduction into domestic commerce.  (1-Bromopropane 106-94-5
Notice Request for Information: Announcement of Carcinogen and Recommended Exposure Limit (REL) Policy Assessment The National Institute for Occupational Safety and Health (NIOSH) of the Centers for Disease Control and Prevention (CDC) intends to review its approach to classifying carcinogens and establishing recommended exposure limits (RELs) for occupational exposures to hazards associated with cancer. As part of this effort, NIOSH is requesting initial input on these issues (including answers to the 5 questions in the following section), to be submitted to the NIOSH Docket number 240, for a comment period lasting through September 22, 2011. This information will be taken under consideration and used to inform NIOSH efforts to assess and document its carcinogen policy and REL policy regarding occupational hazards associated with cancer.

August 23, 2011 -- 76 FR 52664
The National Toxicology Program's carcinogen classification allows for a more differential categorization than NIOSH's definition. N/A
Notice Public Meeting and Request for Information: Carcinogen and Recommended Exposure Limit (REL) Policy Assessment The National Institute for Occupational Safety and Health (NIOSH) of the Centers for Disease Control and Prevention (CDC), Department of Health and Human Services (HHS) announces a public meeting to review its approach to classifying carcinogens and establishing recommended exposure limits (RELs) for occupational exposures to hazards associated with cancer. NIOSH requested initial input on these issues (including answers to five questions listed below under SUPPLEMENTARY INFORMATION), to be submitted to NIOSH Docket number 240.

November 17, 2011 -- 76 FR 71346
In contrast to the current NIOSH Carcinogen Policy, the National Toxicology Program allows for a more differential classification. NA
Total Notices 3


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Occupational Safety and Health Administration
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Notice Ethylene Dibromide OSHA NPRM to revise current occupational exposure standard to reduce PEL, restrict dermal exposure, etc.

October 7, 1983 -- 48 FR 45956
NTP/NCI inhalation bioassay concluded that EDB was carcinogenic to rats. (TR-210) 106-93-4
Notice Asbestos OSHA emergency temporary standard to reduce occupational PEL.

November 4, 1983 -- 48 FR 51086
NTP studies in which Chrysotile, Amosite, Tremolite, and Crocidolite in feed were administered to lab animals with no increased incidence of tumors. 12001-28-4
12001-29-5
12172-73-5
14567-73-8
1332-21-4
Notice Hazard Communication OSHA final rule setting final occupational safety and health standard requiring hazard assessment and communication to employees of chemical hazard information.

November 25, 1983 -- 48 FR 53280
For purposes of hazard communication, OSHA defines a carcinogen as any substance found to be a confirmed or suspected carcinogen by NTP, IARC, or OSHA itself. N/A
Other Ethylene Oxide OSHA final standard on occupational PEL.

June 22, 1984 -- 49 FR 25734
NTP studies show significance of all malignancies rather than increases in only certain types of cancer, in calculating human risk. (TR-326) 75-21-8
Final Rule Benzene OSHA proposed rule on occupational exposure to benzene to reduce PEL from 10 ppm to 8-hr TWA to 1 ppm to reduce risk of leukemia and other adverse health consequences.

December 10, 1985 -- 50 FR 50512
"NTP has demonstrated statistically significant, dose-dependent increase in tumors of multiple sites for both sexes of two species." (TR-289) 71-43-2
Notice 4,4'-Methylenedianiline (MDA) OSHA notice responding to EPA referral of MDA under TSCA Section 9 and announcing determination that the risk described by EPA may be eliminated or reduced by a workplace standard.

February 26, 1986 -- 51 FR 6748
"The most persuasive study has been conducted by the National Toxicology Program" in leading OSHA "to the conclusion that this chemical is carcinogenic in animals and may be carcinogenic to humans." (TR-248) 13552-44-8
Notice 1,3-Butadiene OSHA notice responding to EPA referral under TSCA Section 9 and announcing preliminary conclusion that current PEL should be revised.

April 11, 1986 -- 51 FR 12526
"The magnitude of the carcinogenicity evidence in the NTP animal studies warrants regulatory action." (TR-288) 106-99-0
Final Rule Asbestos, Tremolite, Anthrophyllite, and Actinolite OSHA final rule amending standard for occupational exposure and establishing a PEL.

June 20, 1986 -- 51 FR 22612
NTP studies involved oral administration of chrysotile, amosite, tremolite and crocidolite asbestos to lab animals. 12001-28-4
14567-73-8
12172-73-5
Other 1,3-Butadiene OSHA ANPR to reduce occupational exposure.

October 1, 1986 -- 51 FR 35003
"OSHA has determined that the magnitude of the carcinogenicity evidence in the NTP animal study, almost 100% of the exposed animals developed tumors, warrants regulatory action." (TR-288) 106-99-0
Other Methylene Chloride OSHA ANPR to revise occupational health exposure standards.

November 24, 1986 -- 51 FR 42257
"The NTP bioassays have provided clear evidence of carcinogenicity in female rats and in both sexes of mice." TR-306. 75-09-2
Final Rule Benzene OSHA final rule revising existing occupational standard to reduce PEL (Permissible Exposure Limit) from 10 ppm to 8-hr TWA (time weighted average) of 1 ppm and short-term exposure limit of 5 ppm.

September 11, 1987 -- 52 FR 34460
NTP 2-year inhalation bioassay; TR-289 71-43-2
Final Rule Air Contaminants OSHA final rule amending the air contaminants standard, including new table of Permissible Exposure Limits (PEL).

January 19, 1989 -- 54 FR 2332
NTP research cited includes bioassay of perchloroethylene and propylene oxide. (TR-311) (TR-267) 127-18-4
75-56-9
Notice Methylene Chloride (75-09-2) OSHA agenda notice to planned NPRM setting new standard for occupational exposure.

April 24, 1989 -- 54 FR 16873
This regulatory action is in response to a petition based on information from NTP and EPA. 75-09-2
Proposed Rule 4,4'-Methylenedianiline (13552-44-8) OSHA proposed rule to establish an 8-hour time-weighted average (TWA) of 10ppb, a short-term exposure limit (STEL) of 100PPB, and associated provisions.

May 12, 1989 -- 54 FR 20672
The OSHA-established MDA Advisory Committee used the NTP study "as the principal basis for its carcinogenicity findings." (TR-248) 13552-44-8
Proposed Rule Occupational Exposure to Methylene Chloride Notice of informal public hearings concerning OSHA's proposal to modify the existing provisions for controlling employee exposure to methylene chloride.

June 9, 1992 -- 57 FR 24438
OSHA based its preliminary estimate of human cancer risk on the NTP mouse study. (TR-306) 75-09-2
Proposed Rule Air Contaminants Health Effects of Substances to be Regulated

June 12, 1992 -- 57 FR 26042
OSHA used data from several NTP studies. (TR-363) (TR-228) (TR-263) (TR-382) (TR-273) (TR-311) (TR-362) (TR-217) (TR-267) (TR-314) (TR-349) (TR-251) (TR-376) 74-96-4
75-35-4
78-87-5
98-01-1
79-01-6
127-18-4
106-87-6
96-18-4
117-81-7
75-05-8
75-56-9
80-62-6
87-86-5
26471-62-5
106-92-3
Final Rule Occupational Exposure to Cadmium OSHA publishes a new standard for occupational exposure to cadmium.

September 14, 1992 -- 57 FR 42102
Clear evidence of carcinogenicity of cadmium in animals was based on NTP's definition of clear evidence of carcinogenicity from the Report of the NTP Ad Hoc Panel on Chemical Carcinogenesis Testing and Evaluation. N/A
Final Rule Hazard Communication Requirement of employers to establish hazard communication programs to transmit information on the hazards of chemicals to their employees by means of labels on containers, material safety data sheets, and training programs.

February 9, 1994 -- 59 FR 6126
Annual Report on Carcinogens published by the NTP is used by OSHA in identifying toxic substances to be regulated. N/A
Proposed Rule Respiratory Protection OSHA is proposing to modify its existing standards on respiratory protection so that employers will provide effective protection for employees who wear respirators. agents include saccharin and di-2-ethylhexyl phthalate (DEHP).

November 15, 1994 -- 59 FR 58884
One of the respiratory protection testing agents was di-2-ethylhexyl phthalate (DEHP). OSHA cites positive carcinogenic findings of DEHP in two rodent species by NTP as sufficient evidence to preclude its use in respirator quantitative fit testing. TR-217 117-81-7
Proposed Rule Dichlorvos; Notice of Preliminary Determination to Cancel Certain Registrations and Draft Notice of Intent to Cancel Proposed Rule: OSHA reopened the record for proposed revisions of the 1,3-Butadiene (BD) standard to solicit public comment on a joint labor/industry agreement recommending that OSHA reduce the permissible exposure limits and expand on some provisions that should be included in the standard.

March 8, 1996 -- 61 FR 9381
Representatives of major unions and industry groups submitted a voluntary agreement based in part, on new NTP 1,3-Butadiene data (TR-434). The recommended regulatory requirements can lead to lower and less frequent exposures for employees who work with or near BD. 106-99-0
Notice Supplement to California State Plan; Approval OSHA approves, subject to certain conditions, the California Hazard Communication Standard, including Proposition 65 -- the California Safe Drinking Water and Toxic Enforcement Act.

June 6, 1997 -- 62 FR 31159
In accordance with Proposition 65, California annually publishes a list of chemicals known to cause cancer or reproductive toxicity. This list includes chemicals identified as carcinogens by IARC and the NTP. N/A
Final Rule Air Contaminants OSHA notice providing index to Jan. 19, 1989 final rule and list of references relied upon for health effects evaluations in rule.

March 28, 2000 -- 54 FR 12792
NTP references cited include TR-306, TR-228, TR-263, TR-273, ;TR-311, TR-259, TR-251. 78-87-5
127-18-4
140-88-5
26471-62-5
75-09-2
75-35-4
79-01-6
Final Rule Occupational Exposure to 4,4'Methylenedianiline (MDA) OSHA is promulgating new standards regulating exposure to MDA.

August 10, 2000 -- 57 FR 35630
The Committee determined that the tumors found in the NTP study did not result from exposure to MDA. (TR-248) 13552-44-8
Proposed Occupational Exposure to Hexavalent Chromium OSHA proposes to amend its existing standard for employee exposure to hexavalent chromium (Cr(VI)). The basis for issuance of this proposal is a preliminary determination by the Assistant Secretary that employees exposed to Cr(VI) face a significant risk to their health at the current permissible exposure limit and that promulgating this proposed standard will substantially reduce that risk.

October 4, 2004 -- 69 FR 59305
The NTP's First Annual Report on Carcinogens identified calcium chromate, chromium
chromate, strontium chromate, and zinc chromate as carcinogens in 1980.

The NTP conducted an extensive multigenerational reproductive assessment by continuous breeding where the chromate was administered in the diet. The assessment yielded negative results.
13765-19-0; 7778-50-9
Notice Notice of Availability of the Regulatory Flexibility Act Review of the Occupational Health Standard for Ethylene Oxide The Occupational Safety and Health Administration (OSHA) has conducted a review of its Ethylene Oxide (EtO) Standard pursuant to section 610 of the Regulatory Flexibility Act and section 5 of Executive Order 12866 on Regulatory Planning and Review.

April 22, 2005 -- 70 FR 20807
There is a continued need for the rule. Workers exposed to EtO in a range of industries would continue to be at risk of cancer, genetic changes and other adverse health effects, without the standard. Since the standard was developed, the International Agency for Research on Cancer reclassified EtO as a known human carcinogen and the National Toxicology program reclassified EtO as a one "known to be a human carcinogen." (TR-326)(ROC)
75-21-8
Final Rule Occupational Exposure to Hexavalent Chromium The Occupational Safety and Health Administration (OSHA) is amending the existing standard which limits occupational exposure to hexavalent chromium (Cr(VI)). OSHA has determined based upon the best evidence currently available that at the current permissible exposure limit (PEL) for Cr(VI), workers face a significant risk to material impairment of their health.

February 28, 2006 -- 71 FR 10100
The National Toxicology Program (NTP) conducted an extensive multigenerational reproductive assessment by continuous breeding where the chromate was administered in the diet. The assessment yielded negative results. Animal inhalation studies were also negative. Thus, it cannot be concluded that Cr(VI) is a reproductive toxin for normal working situations. (Hexavalent chromium) 18540-29-9
Proposed Occupational Exposure to Diacetyl and Food Flavorings Containing Diacetyl OSHA is requesting data, information, and comment on issues related to occupational exposure to diacetyl and food flavorings containing diacetyl, including current employee exposures to diacetyl; the relationship between exposure to diacetyl and the development of adverse health effects; exposure assessment and monitoring methods; exposure control methods; employee training; medical surveillance for adverse health effects related to diacetyl exposure; and other pertinent subjects. In this notice, OSHA intends the term diacetyl and food flavorings containing diacetyl to encompass other constituents of food flavorings containing diacetyl. In addition to information on diacetyl, OSHA seeks information on acetoin, acetaldehyde, acetic acid, furfural, and other compounds present in food flavorings that may cause or contribute to flavoring-related lung disease. The Agency is also interested in and seeks information about diacetyl present in substances other than food flavorings (e.g., naturally occurring diacetyl or diacetyl in fragrances) as well as substitutes used in place of diacetyl (e.g., diacetyl trimer). The information received in response to this document will assist the Agency in developing a proposed standard addressing occupational exposure to diacetyl and food flavorings containing diacetyl.

January 21, 2009 -- 74 FR 3938
The National Toxicology Program has approved the nomination of BFV, diacetyl, and acetoin for longer term inhalation testing.  (Artificial Butter Flavoring Mixture) (2,3-Butanedione (Diacetyl)) (Acetoin) BUTTERFLAVMX
431-03-8
513-86-0
Proposed Hazard Communication OSHA proposes to modify its existing Hazard Communication Standard (HCS) to conform with the United Nations’ (UN) Globally Harmonized System of Classification and Labeling of Chemicals (GHS). OSHA has preliminarily determined that the proposed modifications will improve the quality and consistency of information provided to employers and employees regarding chemical hazards and associated protective measures. The Agency anticipates this improved information will enhance the effectiveness of the HCS in ensuring that employees are apprised of the chemical hazards to which they may be exposed, and in reducing the incidence of chemical-related occupational illnesses and injuries.

September 30, 2009 -- 74 FR 50379
Since carcinogenicity is the most controversial and difficult health effect to address, OSHA considers chemicals found to be carcinogenic in the National Toxicology Program’s Report on Carcinogens, or in monographs published by the International Agency for Research on Cancer, to be carcinogens in addition to those regulated by OSHA as carcinogens.  (ROC) NA
Final Rule Hazard Communication In this final rule, OSHA is modifying its Hazard Communication Standard (HCS) to conform to the United Nations' Globally Harmonized System of Classification and Labelling of Chemicals (GHS). OSHA has determined that the modifications will significantly reduce costs and burdens while also improving the quality and consistency of information provided to employers and employees regarding chemical hazards and associated protective measures. Consistent with the requirements of Executive Order 13563, which calls for assessment and, where appropriate, modification and improvement of existing rules, the Agency has concluded this improved information will enhance the effectiveness of the HCS in ensuring that employees are apprised of the chemical hazards to which they may be exposed, and in reducing the incidence of chemical-related occupational illnesses and injuries. The modifications to the standard include revised criteria for classification of chemical hazards; revised labeling provisions that include requirements for use of standardized signal words, pictograms, hazard statements, and precautionary statements; a specified format for safety data sheets; and related revisions to definitions of terms used in the standard, and requirements for employee training on labels and safety data sheets. OSHA is also modifying provisions of other standards, including standards for flammable and combustible liquids, process safety management, and most substance-specific health standards, to ensure consistency with the modified HCS requirements. The consequences of these modifications will be to improve safety, to facilitate global harmonization of standards, and to produce hundreds of millions of dollars in annual savings.

March 26, 2012 -- 77 FR 17574
Used the classification listing that NTP uses on Safety Data Sheets; based classification to determine carcinogenicity on the National Toxicology Program’s Report on Carcinogens (ROC). NA
Proposed Occupational Exposure to Respirable Crystalline Silica The Occupational Safety and Health Administration (OSHA) proposes to amend its existing standards for occupational exposure to respirable crystalline silica. The basis for issuance of this proposal is a preliminary determination by the Assistant Secretary of Labor for Occupational Safety and Health that employees exposed to respirable crystalline silica face a significant risk to their health at the current permissible exposure limits and that promulgating these proposed standards will substantially reduce that risk. This document proposes a new permissible exposure limit, calculated as an 8-hour time-weighted average, of 50 micrograms of respirable crystalline silica per cubic meter of air (50 μg/m3). OSHA also proposes other ancillary provisions for employee protection such as preferred methods for controlling exposure, respiratory protection, medical surveillance, hazard communication, and recordkeeping. OSHA is proposing two separate regulatory texts—one for general industry and maritime, and the other for construction—in order to tailor requirements to the circumstances found in these sectors.

September 12, 2013 -- 78 FR 56274
National Toxicology Program Report on Carcinogens (ROC):  Silica crystalline (respirable size) is known to be a human carcinogen.   None assigned
Total Notices 30


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United States Department of Agriculture
Notice Type Title Summary of Notice NTP Information Cited CAS Number
Final Rule Irradiation of Pork USDA final rule to permit gamma radiation to control Trichinella Spiralis.

January 15, 1986 -- 51 FR 1769
NTP review of histopathology data on mice fed irradiated chicken, requested by FDA, concluded that data did not demonstrate a carcinogenic response. N/A
Notice Information Collection; Qualified Products List for Class A Foams for Wildland Firefighting In accordance with the Paperwork Reduction Act of 1995, the Forest Service is seeking comments from all interested individuals and organizations on the extension (without revision) of a currently approved information collection, Qualified Products List for Class A Foams for Wildland Firefighting.

September 11, 2011 -- 76 FR 58461
The Forest Service evaluates and approves commercial wildland firefighting chemicals. Products must not contain chemicals listed as a Chemical of Concern. To create their list, they include chemicals appearing in the National Toxicology Program’s Report on Carcinogens. (ROC) NA
Notice Information Collection; Qualified Products List for Water Enhancers (Gels) for Wildland Firefighting In accordance with the Paperwork Reduction Act of 1995, the Forest Service is seeking comments from all interested individuals and organizations on the extension (without revision) of a currently approved information collection, Qualified Products List for Water Enhancers (Gels) for Wildland Firefighting.

September 21, 2011 -- 76 FR 58462
The Forest Service evaluates and approves commercial wildland firefighting chemicals. Products must not contain chemicals listed as a Chemical of Concern. To create their list, they include chemicals appearing in the National Toxicology Program’s Report on Carcinogens. (ROC) NA
Notice Information Collection; Qualified Products List for Long-Term Retardant for Wildland Firefighting In accordance with the Paperwork Reduction Act of 1995, the Forest Service is seeking comments from all interested individuals and organizations on the extension (with contact revision) of a currently approved information collection, Qualified Products List for Long-Term Retardant For Wildland Firefighting.

September 21, 2011 -- 76 FR 58460
The Forest Service evaluates and approves commercial wildland firefighting chemicals. Products must not contain chemicals listed as a Chemical of Concern. To create their list, they include chemicals appearing in the National Toxicology Program’s Report on Carcinogens. (ROC) N/A
Total Notices 4

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The NTP is administratively located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.

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