Synonyms: 1-Butanesulfonicacid, 1,1,2,2,3,3,4,4,4-nonafluoro-, potassium salt (8CI,9CI);Bayowet C 4;Biowet C 4;Eftop KFBS;F 114P;FR 2025;FR 2225;Flutel RM 65;K-NONA;KFBS;Megafac F 114;Megafac F 114P;Megafac F 411;Perfluorobutanesulfonicacid potassium salt;Potassium nonaflate;Potassium nonafluorobutanesulfonate;RM 65;FC-98;Perfluorobutansulfonic acid;