In the inorganic industry, as an activator for the production of activated carbon, activated carbon becomes porous and increases its surface area. It is also used in the manufacture of alcohol-resistant foam fire extinguishing fluid and the raw material for the production of zinc cyanide. In the organic industry, it is used as a solvent for polyacrylonitrile, a contact agent and dehydrating agent for organic synthesis. Condensing agent, deodorant. Special surfactants and catalysts used in the production of vanillin, otorrhizal, indomethacin drugs, and cation exchange resins. Used as a purifying agent in the petroleum industry. In the dye industry, it is used as a stabilizer for the color salt of ice dyes, and also used in the production of reactive dyes and cationic dyes. The rubber industry is used as an auxiliary material for the vulcanization accelerator zPC. Used as mordant, mercerizing agent and weighting agent in printing and dyeing industry. The electroplating industry is used as a zinc ion additive for ammonium salt zinc plating. The pigment industry is used as a raw material for white pigments. The metallurgical industry is used to produce aluminum alloys and treat metal surfaces. As a rust remover when welding. Coal preparation plants are often used for floating and sinking experiments.