Custom Mix of C4-C10 carboxylic acids and C4, C6, C8 sulfonates 2810.4 n-Perfluorobutyric acid, PFBA 2819.6 n-Perfluoropentanoic acid, PFPeA 2590.6 n-Perfluorohexanoic acid, PFHxA 2821.7 n-Perfluoroheptanoic acid, PFHpA 2042.8 n-Perfluorooctanoic ac