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Methazole and Tributyltin methacrylate Listed December 1, 1999

Chemicals Listed Effective December 1, 1999 as Known to the State to Cause Cancer or Reproductive Toxicity: Methazole and Tributyltin methacrylate

The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is adding the two chemicals named below 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 or the Act). The chemicals are listed effective December 1, 1999 pursuant to an administrative listing mechanism provided under the Act, based upon a formal identification by an authoritative body that the chemicals cause reproductive toxicity. Regulations governing the listing of chemicals under the "authoritative bodies" mechanism are published in Title 22, California Code of Regulations, Section 12306.

The reader is directed to the Notice of Intent to List Chemicals published in the October 1, 1999 issue of the California Regulatory Notice Register for the supporting documentation which OEHHA relied upon in making its determination that the criteria for administrative listing had been satisfied. A complete, updated chemical list is available in the download area of this web page.

The chemicals being listed under Proposition 65 as known to cause reproductive toxicity are shown below:

Chemical CAS NO Toxicological Endpoint
Methazole 20354-26-1 developmental toxicity
Tributyltin methacrylate 2155-70-6 developmental toxicity

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