Characters ■ * sodium known as Sodium Sulfate, anhydrous compound as a white, odorless, bitter-tasting crystalline powder, hygroscopic. Appearance colorless, transparent, large crystals or particles of small crystals. Use 1, the chemical industry for the manufacture of sodium sulfide, sodium sulfide, sodium silicate (water glass) and other chemical products. 2, synthetic detergent: industrial washing synthetic detergent filler. 3, paper and pulp industry for manufacturing * salt when cooking agent. 4, Glass: glass industry to replace the soda, as co-solvents. The amount of sodium sulfate in the glass industry for 12% of the total amount. 5, textile: textile industry for the deployment of Vinylon spinning coagulant. 6 for non-ferrous metallurgy, leather and so on. 7, including special Sodium Sulfate Sodium Sulfate in the field of animal feed and medicine use, and new varieties of coarse grain, color particles used in the detergent industry, and so on. The role of the different grades of sodium sulfate: sodium sulfate according to which the content of impurities and color divided into different levels, the relevant knowledge outlined below, the electronic level (Main content> 99.99): mainly used in medicine As antidiarrheal agents, in very small quantities, there is no domestic production, mainly in Japan. A first grade class (Main content> 99.0): mainly used for dyeing, synthetic detergent, vinylon. First Grade II (including the main> 98.0): mainly used in glass, dyes, paper and other industries. Three primary products (mainly contains> 95.0): mainly used for inorganic salts and other industrial raw materials or other products as fillers.