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Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) (Project)
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are a broad class of fluorine-rich specialty chemicals. More than 4,700 PFAS are used in consumer, commercial and industrial applications, including food packaging materials, waterproof textiles, stain-resistant carpets and furniture, fire-suppression foams, processing aids for the production of fluoropolymers like Teflon, mist suppressants in metal-plating, and hydraulic aviation fluids. Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) have been shown to be highly toxic and have been phased out of production in the US.