2007-07-31T10:56:24.29This is an old request which had no CAS number at the time. However, still cannot find CAS for perfluorooctylsulfonate acid amide in 2016. Is not a synonym of the commonly known PFOSA with CAS 754-91-6. Have to deprecate to clarify. See PFOSD508e5861-7f27-4f09-9133-9c20480ac1e12018-10-10T12:56:41.28truePerfluorooctylsulfonate acid amide (deprecated)