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California Requires Tire Makers to Evaluate Alternative Chemicals to Improve

The Department of Toxic Substances Control (DTSC) in California has implemented a rule that requires producers of vehicle tires for sale in the state to investigate safer alternatives to the chemical 6PPD which is used by manufacturers to reduce tire cracking and enhance service life.

The ruling was adopted to protect public and environmental health, and comes as 6PPD has been found to react with ozone in the air, resulting in 6PPD-quinone. Traces were discovered in California’s streams, with the chemical found to kill coho salmon as the species migrates upstream to spawn.



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