CMNP (Pyrazachlor) Listed Effective August 25, 2015 as Known to the State of California to Cause Cancer

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Effective August 25, 2015, the Office of Environmental Health Hazard Assessment (OEHHA) is adding CMNP (pyrazachlor) (CAS No. 6814-58-0) to the list of chemicals known to the state to cause cancer for purposes of Proposition 65[1].  

The listing of CMNP (pyrazachlor) is based on formal identification by the US Environmental Protection Agency (US EPA), an authoritative body[2], 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 27, Cal. Code of Regs., section 25306.

The documentation supporting OEHHA’s determination that the criteria for administrative listing have been satisfied for CMNP (pyrazachlor) is included in the “Notice of Intent to List CMNP (Pyrazachlor) and Sedaxane” posted on OEHHA’s website and published in the June 26, 2015 issue of the California Regulatory Notice Register (Register 2015, No. 26-Z).  The publication of the notice initiated a public comment period that closed on July 27, 2015.  OEHHA received no public comments on CMNP. 

A complete, updated chemical list is published in this issue of the California Regulatory Notice Register and is available on the OEHHA website.

In summary, CMNP (pyrazachlor) is listed under Proposition 65 as known to the state to cause cancer, as follows:

Chemical

CAS No.

Toxicological

Endpoints

Listing Mechanism*

CMNP (pyrazachlor)

6814-58-0

Cancer

AB (US EPA)

Footnotes and References

*Listing mechanism:  AB – “authoritative bodies” mechanism (Title 27, Cal. Code of Regs. section 25306).

[1] The Safe Drinking Water and Toxic Enforcement Act of 1986, Health and Safety Code section 25249.5 et seq.

[2] See Health and Safety Code section 25249.8(b) and Title 27, Cal. Code of Regs., section 25306.