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Perfluoro-p-ethylcyclohexylsulfonic acid Perfluoro-p-ethylcyclohexylsulfonic acid USP/EP/BP 1,2,2,3,3,4,5,5.6.6-Hexafluro-4-pentafluroethyl cyclohexanesulfonoic acid 1,2,2,3,3,4,5,5,6,6-decafluoro-4-(1,1,2,2,2-pentafluoroethyl)cyclohexane-1-sulfonic acid Cyclohexanesulfonic acid, 1,2,2,3,3,4,5,5,6,6-decafluoro-4-(1,1,2,2,2-pentafluoroethyl)-