AC-OBS is high purity sodium perfluoroanenyloxybenzenesulfonate powder with over 99% active content and containing no PFOS and PFOA. According to the final content conversion using the external standard method of liquid chromatography, the effective content of AC-OBS is 1.03-1.1 times that of other commercially available sodium perfluoroanenyloxybenzenesulfonate powder products at present.