1.0 2026-09-22 05:24:17 UTC 2026-09-22 05:24:17 UTC FDB117766 Perfluorooctanesulfonic acid 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluorooctane-1-sulfonic acid C8HF17O3S 500.13 499.937494073 heptadecafluorooctane-1-sulfonic acid PFOS OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F InChI=1S/C8HF17O3S/c9-1(10,3(13,14)5(17,18)7(21,22)23)2(11,12)4(15,16)6(19,20)8(24,25)29(26,27)28/h(H,26,27,28) YFSUTJLHUFNCNZ-UHFFFAOYSA-N belongs to the class of organic compounds known as perfluorooctane sulfonic acid and derivatives. These are organic compounds containing an octyl chain attached to the sulfur of a sulfonic acid (or a derivative thereof), where all hydrogens of the octyl chain are replaced by fluorine atoms. Perfluorooctane sulfonic acid and derivatives Organic compounds Organohalogen compounds Alkyl halides Alkyl fluorides Aliphatic acyclic compounds Alkanesulfonic acids Hydrocarbon derivatives Organic oxides Organofluorides Organosulfonic acids Sulfonyls Aliphatic acyclic compound Alkanesulfonic acid Hydrocarbon derivative Organic oxide Organic oxygen compound Organic sulfonic acid or derivatives Organofluoride Organosulfonic acid Organosulfonic acid or derivatives Organosulfur compound Perfluorooctane sulfonic acid or derivatives Sulfonyl organofluorine compound organosulfonic acid logp 4.24 ALOGPS logs -3.84 ALOGPS solubility 7.27e-02 g/l ALOGPS logp 5.43 ChemAxon pka_strongest_acidic -3.3 ChemAxon iupac heptadecafluorooctane-1-sulfonic acid ChemAxon average_mass 500.13 ChemAxon mono_mass 499.937494073 ChemAxon smiles OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ChemAxon formula C8HF17O3S ChemAxon inchi InChI=1S/C8HF17O3S/c9-1(10,3(13,14)5(17,18)7(21,22)23)2(11,12)4(15,16)6(19,20)8(24,25)29(26,27)28/h(H,26,27,28) ChemAxon inchikey YFSUTJLHUFNCNZ-UHFFFAOYSA-N ChemAxon polar_surface_area 54.37 ChemAxon refractivity 50.98 ChemAxon polarizability 22.56 ChemAxon rotatable_bond_count 8 ChemAxon acceptor_count 3 ChemAxon donor_count 1 ChemAxon physiological_charge -1 ChemAxon formal_charge 0 ChemAxon Specdb::CMs 34254 Specdb::CMs 131019 Specdb::CMs 138753 Specdb::MsMs 55965 Specdb::MsMs 55966 Specdb::MsMs 55967 Specdb::MsMs 111252 Specdb::MsMs 111253 Specdb::MsMs 111254 Specdb::MsMs 374095 Specdb::MsMs 374105 Specdb::MsMs 438915 Specdb::MsMs 438916 Specdb::MsMs 438917 Specdb::MsMs 438918 Specdb::MsMs 438919 Specdb::MsMs 438920 Specdb::MsMs 440647 Specdb::MsMs 2277347 Specdb::MsMs 2277348 Specdb::MsMs 2277349 Specdb::MsMs 3088513 Specdb::MsMs 3088514 Specdb::MsMs 3088515