This standard specifies a method for the determination of Bemex and its salts in cosmetics using High performance liquid chroma-tography, HPLC, which is suitable for emulsion, cream and water cosmetics. The detection limit of the method is 2 mg/kg, and the quantification limit is 5 mg/kg. The method uses High Performance Liquid Chromatograph for qualitative and quantitative analysis after ultrasonic extraction and centrifugation of the sample. This standard provides a reliable basis for the detection of Bemex and its salts in cosmetics, which is helpful for product mass control and safety assurance.