Sodium tungsten oxide dihydrate (Na2WO4•2H2O)-Powder introduce:
Sodium tungstate is the inorganic compound with the formula Na2WO4. This white, water-soluble solid is the sodium salt of tungstic acid.
Molar mass:293.82 g/mol
Appearance:White rhombohedral crystals
Density:4.179 g/cm3 (anhydrous);3.25 g/cm3 (dihydrate)
Melting point:698 °C (1,288 °F; 971 K)
Solubility in water:57.5 g/100 mL (0 °C);74.2 g/100 mL (25 °C);96.9 g/100 mL (100 °C)
Solubility:slightly soluble in ammonia;insoluble in alcohol, acid
Crystal structure:Rhombic (anhydrous);orthorhombic (dihydrate)
In organic chemistry, sodium tungstate is used as catalyst for epoxidation of alkenes and oxidation of alcohols into aldehydes or ketones. Used in examining the serum protein, serum protein-free filtrate. Used as alkaloid precipitating agent. Used in manufacture of metal tungsten, tungstate and tungsten oxide. Waterproof and fireproof fabric.
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