1,1,2,2,3,3,4,4,4-Nonafluoro-1-butanesulfonic acid 1,1,2,2,3,3,4,4,4-Nonafluorobutane-1-sulphonic acid 1-Butanesulfonic acid, 1,1,2,2,3,3,4,4,4-nonafluoro- 1-Butanesulfonic acid, nonafluoro- (6CI,7CI,8CI) 1-Perfluorobutanesulfonic acid 375-73-5 59933-66-3 EINECS 206-793-1 Nonafluoro-1-butanesulfonic acid Nonafluorobutanesulfonic acid Pentyl perfluorobutanoate