375-22-4 Butanoic acid, heptafluoro- Butyric acid, heptafluoro- Heptafluoro-1-butanoic acid Heptafluorobutanoic acid Heptafluorobutyric acid NSC820 Perfluorobutanoic acid Perfluorobutyric acid Perfluoropropanecarboxylic acid WLN: QVXFFXFFXFFF