The new rule applies to any tire in "the stream of commerce" in the state and takes effect Oct. 1.
Domestic and foreign manufacturers have until Nov. 30 to notify DTSC if they manufacture 6ppd-containing tires that are used in California, DTSC spokesman Russ Edmondson said.
"We are working with the U.S. EPA, other states, researchers and the (U.S.) Tire Manufacturers Association to find a path to make tires safer for our environment without compromising on-road safety," DTSC Director Meredith Williams told Rubber News.
The Washington-based USTMA immediately responded to the new rule from the California DTSC, announcing an official consortium of 16 of the world's largest tire producers to tackle the critical alternative research.
The companies—which include Michelin, Bridgestone, Goodyear and Continental, among many others—will be guided in their research by California's Safer Consumer Product Regulations, and the listing of 6ppd as a "priority product" within the program.
The SCPR framework helps products and chemicals comply with Federal Motor Vehicle Safety Standards and other consumer, vehicle and tire manufacturer requirements.