Basic information

Characters are colorless crystals or white crystalline powders. Weathered in dry air, losing crystal water at 100 °C. Soluble in water, insoluble in ethanol. The relative density is 3.23~ 3.25. Melting point 698 ° C (anhydrous) Storage: sealed and cool and dry. Physical and chemical properties: Sodium tungstate is a white lustrous flake crystal or crystalline powder, soluble in water and insoluble in ethanol. Weathered in the air. The crystal water was lost by heating to 100 ° C to form an anhydrate. Reacts with strong acid (outside) to form water-insoluble yellow tungstic acid, which reacts with phosphoric acid or phosphate to form a phosphotungstic heteropoly acid complex, which reacts with organic acids such as tartaric acid, citric acid and oxalic acid to form corresponding organic acid complexes.

Application

1,Used for mordant, analytical reagent, catalyst, water treatment agent, fireproof and waterproof material, as well as phosphotungstate and boron tungstate. 

2, Used to make metal tungsten, tungstic acid, tungstate, etc. 

3, Used in mordants, pigments, dyes, inks. 

4, Used for anti-corrosion of electroplating coating. 

5, Used as a co-solvent to introduce enamel color can reduce the firing temperature and complementary color. 

6. Used in the production of petroleum industry and aviation and aerospace materials.