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Perfluorooctanoic acid (PFOA, or C8) has been used as a surfactant in the emulsion polymerization of PTFE, although several manufacturers have entirely discontinued its use. PFOA persists indefinitely in the environment. It is a toxicant and carcinogen in animals.
-------- ---------. PFOS. PFOA is perfluorooctanoic acid and is sometimes called C8 or C-8. It is a man-made chemical and does not occur naturally in the environment. Perfluorooctanoic acid (PFOA or C8) CAS No: 335-67-1.Molecular formula:The PFOA acronym is used to indicate not only perfluorooctanoic acid itself, but also its principal salts.t is a man-made chemical and does not occur naturally in the environment. Perfluorooctanoic acid (PFOA or C8) CAS No: 335-67-1. Molecular formula: The PFOA acronym is used to indicate not only perfluorooctanoic acid itself, but also its principal salts.