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Federal Register · January 17, 2025
The title they went with N-(1,3-Dimethylbutyl)-N′-phenyl-p-phenylenediamine (6PPD) and its transformation product, 6PPD-quinone; Regulatory Investigation under the Toxic Substances Control Act (TSCA); Extension of the Comment Period Noisy translates that to

US environmental regulators extend comment period on tire chemical investigation

What happened
US environmental regulators are extending the public comment period for a chemical found in tires. This chemical, 6PPD, and its breakdown product, 6PPD-quinone, are under investigation for potential risks.
Why it matters
This extension gives more time for the public and industry to submit information about the chemical 6PPD and its effects. It also allows for more input on potential alternatives and regulatory options. The US environmental regulators are considering future actions under the Toxic Substances Control Act, which could lead to new rules for tire manufacturers.
The signal
Watch for the next steps from the US environmental regulators after the comment period closes, specifically if they propose new rules for tire manufacturing or chemical use.
If you insist
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