Sodium tungstate, Na2WO4•2H2O, a tungstate of sodium, is useful as a source of tungsten. It is prepared from tungsten ores used to manufacture tungsten by reducing it. It is often found as the dihydrate, Na2WO4•2H2O. This salt is soluble in water and is a moderately strong oxidizing agent. .
Colorless crystal or white crystalline powder. In dry air weathering, lose crystal water at 100 ℃. Soluble in water, soluble in ethanol. The relative density of 3.23 ~ 3.25. Melting point 698 ℃ (dry goods).
Sodium tungstate is mainly used to produce ammonium paratungstate and depth of processing preparation of tungsten trioxide, tungsten, tungsten carbide, tungsten carbide, tungsten, tungsten, etc., to made metatungstate, tungsten acid and other tungsten compounds used in petroleum chemical, plating, textiles, flame retardants, water, dyes, pigments, inks, etc.
General Grade and Properties