OEHHA Data Call-In for Diaminotoluenes Reveals Increased Scrutiny of Proposition 65 Listings
On November 7, 2014, the California Office of Environmental Health Hazard Assessment published a Request for Relevant Information for diaminotoluene (mixed). This data call-in represents the first step of OEHHA's reconsideration of the Proposition 65 carcinogen listing of this particular category of chemicals, which covers all isomers of diaminotoluene. This regulatory proceeding reveals more than initially meets the eye. Diaminotoluenes are used in the preparation of dyes and are intermediates in the synthesis of other chemicals. There are a number of diaminotoluene isomers, including 2,4-diaminotoluene. The original 1990 listing of diaminotoluene (mixed) -- i.e., all diaminotoluene isomers --was based on U.S.…