The Office of Environmental Health Hazard Assessment has removed diaminotoluene (mixed) from the state's Proposition 65 list of substances known to the state to cause cancer on November 10 and the delisting enters into force on November 20.

On 1 January 1990, diaminotoluene (mixed) was initially listed under Prop 65 due to its carcinogenicity. On 21 October 2014, OEHHA received a petition from a company to reassess the chemical. The EPA document indicates the carcinogenic properties of the isomer 2,4-diaminotoluene. However, on 4 November 2015, the Carcinogen Identification Committee (CIC) showed “diaminotoluene (mixed) has not been clearly shown, through scientifically valid testing according to generally accepted principles, to cause cancer”. As a result, isomer 2,4-diaminotoluene is still on the listing and diaminotoluene (mixed) will be removed from Prop 65 since November 20.

As stipulated in Prop 65, companies that engaging in the manufacture, use and release of chemicals or other activities concerning to the listed chemicals shall not discharge such dangerous chemicals to the drinking waters, and clear and reasonable warning labels are required (A warning is necessary for listed chemicals unless the exposure is quite low posing no significant risk).

Reminder: Companies intended to export to the United States should track the update of Prop 65 and make timely preparation.