Sodium tungstate chemical formula Na2WO4 2H2O Molecular weight 32986 Colorless rhombohedral platelike crystal Melting point 698 relative density 32319 Stable in air loses 2 molecules of water when heated to 100 and becomes an anhydrous salt at 698 The latter is a white orthorhombic crystal with a relative density of 418185 Easy to dissolve in water slightly soluble in ammonia water insoluble in ethanol
Used as an intermediate raw material for producing tungsten metal and other tungsten products as well as a fireresistant material for textiles or fibers
Mainly used for manufacturing tungsten metal tungstic acid and tungstate as well as dyes pigments inks electroplating and other aspects Also used as a fireproof agent catalyst etc for fabrics and cellulose Used as an analytical reagent alkaloid precipitant waterproofing agent for fabrics and also for the production of ammonium phosphotungstate and other tungsten compounds