Scientific Study Links Tire Preservative Chemical 6PPD to Fish Deaths

Yesterday, Science published a peer-reviewed scientific study linking 6PPD, a common rubber antioxidant chemical found in tire preservatives, to coho salmon mortality in the Pacific Northwest. The New York Times, Seattle Times, and other media outlets covered the study. 

The authors of the study published in Science concluded that the 6PPD from the tires reacts to form 6PPD-quinone, which is toxic to salmon. Although most commonly used to increase the life of tires, 6PPD is also found in other rubber consumer products, such as the seals of pressure cookers and crumb rubber used at playgrounds and soccer fields. 

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