... -42-3 chromium fog inhibitor FT-248 Fluorosurfactant FT-248(Tetraethylammonium perfluorooctanesulfonate)Trade name: FT-248CAS No.:56773-42-3Molecular formula ... baths, chromatizing baths.5. Used as demould agent for plastic tetraethylammonium Tetraethylammonium perfluorooctanesulfonate 56773-42-3