Heptadecafluorooctanesulfonic Acid (PFOS) is a persistent environmental pollutant that may cause adverse health effects in humans.Synonyms:1,1,2,,3,3,4,4,5,5,6,6,7,7,8,8,8-Heptadecafluoro-1-octanesulfonic Acid Potassium Salt; Fluorad 95; Fluortensid FT 800; Megafac F 110; Megafac F 116; Perfluorooctanesulfonic Acid Potassium Salt; Potassium Heptadecafluorooctane-1-sulfonate; Potassium Perfluorooctanesulfonate; Potassium Perfluorooctylsulfonate; EF 102; Eftop EF 102; F 110; F 116; FC 95CAS Number:2795-39-3Molecular Formula:C₈F₁₇KO₃SMolecular Weight:538.22Appearance:White to beige powderPurity:≥98%