2-Hydroxytetrafluoroethanesulfonic acid β-sultone697-18-7100 % similar 3-(Trifluoromethyl)-3,4,4-trifluoro-1-oxa-2-thiacyclobutane 2,2-dioxide773-15-950 % similar Nonafluorobutanesulfonic acid anhydride36913-91-438 % similar Trifluoromethanesulfonic anhydride358-23-638 % similar Perfluoro(2-ethoxyethane)sulfonic acid113507-82-734 % similar Methyl trifluoromethanesulfonate333-27-733 % similar 1,1,2,2-Tetrafluoro-2-(1,1,2,2-tetrafluoro-2-iodoethoxy)ethanesulfonyl fluoride66137-74-433 % similar Trimethylsilyl trifluoromethanesulfonate27607-77-830 % similar Ethyl 1,1,1-trifluoromethanesulfonate425-75-230 % similar 2,2,2-Trifluoroethyl trifluoromethanesulfonate6226-25-130 % similar