California’s Department of Toxic Substances Control (DTSC) has adopted a rule that requires manufacturers of motor vehicle tires for sale in California to evaluate safer alternatives to 6PPD, a chemical that helps reduce tire cracking and extends the useful life of tires. DTSC’s regulation to add motor vehicle tires containing 6PPD to the state’s list of Priority Products, which was proposed in 2022, will take effect on October 1, 2023. Domestic and foreign manufacturers will have until November 30th, 2023 to notify DTSC if they manufacture 6PPD-containing tires that are placed into the stream of commerce in California. DTSC is working with the U.S. Tire Manufacturers Association (USTMA) to help tiremakers navigate the process.
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