1,1,2,2,3,3,4,4,5,5,5-Undecafluoro-1-pentanesulfonyl fluoride 1-Pentanesulfonyl fluoride, 1,1,2,2,3,3,4,4,5,5,5-undecafluoro- 375-81-5 EINECS 206-795-2 Perfluoropentane-1-sulphonyl fluoride