Beyond PFAS: What's up with emerging contaminant N-(1,3-Dimethylbutyl)-N'-phenyl-pphenylenediamine (6PPD)?

A research team from the University of Washington-Tacoma and Washington State University has discovered a new chemical called 6PPD-quinone that causes extreme mortality in salmon. This chemical is formed through the interaction of 6PPD with ozone. The discovery has led to legal conversations and research programs across the nation, particularly in California and the Pacific Northwest. Recent research has shown that 6PPD-quinone is highly toxic to aquatic organisms, including coho salmon and rainbow trout. Efforts are being made to manage and regulate this chemical, including the development of safer alternatives and the implementation of green infrastructure projects. The EPA has formed a work group to address this issue, and states like California and Washington have already taken steps to regulate 6PPD. Additionally, there have been petitions, approvals, and lawsuits related to the use of 6PPD in tires under the Toxic Substances Control Act and the Endangered Species Act. The next 18 months are expected to be active in terms of managing and regulating 6PPD and 6PPD-quinone. [Extracted from the article]

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