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OEHHA Delists Diaminotoluene as a Chemical to Cause Cancer

December 17, 2015

UNITED STATES - The California Office of Environmental Health Hazard Assessment (OEHHA) has removed Diaminotoluene (mixed) from the list of chemicals known to cause cancer after no scientifically valid testing proves it is carcinogenetic.

Diaminotoluene (mixed) was originally added to the Proposition 65 list on January 1, 1990. With a petition from a private company, the chemical was listed to cause cancer on October 21, 2014.

The U.S. Environmental Protection Agency (EPA) concluded at that time that basis for the listing of indicates that the hazard ranking of diaminotoluene (mixed) “is applicable to all isomers of diaminotoluene,” and that the evidence on potential carcinogenicity from animal studies is “sufficient.”

The EPA indicated in the document that the listing is tagged with “this evidence is based on the carcinogenic properties of the isomer 2,4-diaminotoluene.” No other document was presented to prove EPA’s basis.

In effect, OEHHA had to refer the chemical to the Carcinogen Identification Committee (CIC) that concluded that diaminotoluene (mixed) has not been clearly shown, through scientifically valid testing according to generally accepted principles, to cause cancer.

The delisting of diaminotoluene (mixed) is effective beginning December 20, 2015.