This product is used in polyacrylonitrile fiber dyeing modifier, various reactive emulsifiers, flocculants, water reducing agents for commercial concrete, etc. Sodium methacrylic sulfonate is used as a chemicalbook modifier for polyacrylonitrile fiber dyeing, various reactive emulsifiers, flocculants, and water reducers for commercial concrete. It is mainly used as the third monomer in the production of acrylic fiber, which can well improve the dyeing and heat resistance of acrylic fiber