reformulated Scotchgard.
*perfluorobutane sulfonamide (FBSA), sulfonamide derivative of PFBS.
*perfluorooctanesulfonyl fluoride (POSF), precursor to PFOS-based compounds.
*perfluorooctanesulfonamide (PFOSA), used in 3M's Scotchgard formulation.
*perfluorooctanesulfonic acid (PFOS),