Sodium tungstate, Na2WO4, a tungstate of sodium, is useful as a source of tungsten. It is prepared from tungsten ores used to manufacture tungsten by reducing it. Sodium tungstate is often found as the Sodium tungstate dihydrate, Na2WO4•2H2O. This salt is soluble in water and is a moderately strong oxidizing agent.
|Index Name||Sodium tungstate|
|Sodium tungstate 99%||Sodium tungstate 98%||Sodium tungstate 96%|
|Water Insoluble Substances||0.005||0.05||0.1|
Sodium tungstate as the intermediate for manufacturing tungsten material; also applied to the manufacture of mordant, catalyst, pigment, analytic reagent, fabric-weight agent in the textile industry, also applied to the fire prevention, waterproof fabric.
Iron drums or knit bags with the net capacities of 50 kg or 100 kg.
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Sodium tungstate is a kind of inorganic substance, chemical formula is Na2WO4, colorless crystalline or white crystalline powder, weathering in dry air, relative density 3.23 ~ 3.25, melting point 698℃ (anhydrous). Sodium tungstate is colorless crystal or white rhomboid crystal, shiny flake crystal or crystalline powder, sodium tungstate is soluble in water, the aqueous solution is slightly alkaline, insoluble in ethanol, slightly soluble in ammonia. Weathering in the air. Heating to 100℃ loss of crystalline water and anhydrous substance. React with strong acid (except hydrofluoric acid) to form insoluble yellow tungstic acid, react with phosphoric acid or phosphate to form phosphotungstic heteropoly acid complex, react with tartaric acid, citric acid, oxalic acid and other organic acids to form the corresponding organic acid complex.