CAS 336-59-4 appears in our catalog under these names: Heptafluorobutyric Anhydride, Heptafluorobutyric anhydride, Heptafluorobutyric Anhydride, >95.0%(T), Heptafluorobutyric anhydride, 98%, HEPTAFLUOROBUTYRIC ANHYDRIDE, &. Offered by: TRC, GLPBio, Biosynth, TCI, Thermo Scientific (Acros). Available pack sizes: 100mg, 1g, 500mg, 100g, 10g, 25g, 5g, 10AMP.