Perfluorooctanesulfonyl fluoride CAS No. 307-35-7 Molecular formula: n-C8F17SO2F Molecular Structure: Molecular weight: 502 Appearance: colorless or yellowish transparent liquid Specific gravity: 1.82~1.85g/cm3 Refractive index1.299 Boiling point: 154.5C(744mm) mp: -18 -30c PH: 3-4 Assay: 90%min. Chloride: 0.01%max Residue on ignition: 0.1%max