2218-54-4 375-22-4 Butanoic acid, heptafluoro-, sodium salt Butyric acid, heptafluoro-, sodium salt EINECS 218-721-6 Heptafluorobutanoic acid, sodium salt NSC 52381 Sodium heptafluorobutanoate Sodium heptafluorobutyrate Sodium perfluorobutanoate Sodium perfluorobutyrate