Index name Product standard Appearance White crystalline powder Purity ≥ 99.4 Iron content (ppm) ≤ 2.0 Water content % ≤ 0.16 Melting point ≥ 185.0 Acid No. , mgKOH/g 272.0-275.0 Non-volatile matter % ≥ 99.7 Chroma (in the deionize water the weight is 25%) ≤ 5 In the structure of the AMPS there are containing strong anion and water-soluble sulfur group, shield the amide group and the unsaturated double bond, these make the AMPS have the excellent performance. The AMPS has the excellent complexation、adsorptivity、biological activity、surface activity、hydrolytic stability and thermal stability. It can be used in co polymerization and in addition reaction, it is widely used in water treatment 、oilfield chemicals、chemical fiber、water absorbent material、plastics、paper making、spinning、printing and dyeing、biomedicine、magnetic material and makeup etc.