Chinese common name (T-4)-dihydrotungstic acid, tungstic acid, tungstic acid, tungstic (VI) acid
English name Tungstic Acid
English aliases: (beta-4)-tungstate(wo42-dihydrogen, dihydrogen, (T-4)-Tungstate, O2W(OH)2, Orthotungstic acid, Tungstate (WO42-), dihydrogen, (T-4)-; Tungstate (WO42-), dihydrogen, (T-4)-; Tungstate, dihydrogen, (T-4)-; Tunstic acid
Tungstic Acid Chemical Formula H2O4W
Molecular weight of tungstic acid 249.85
Molecular structure of tungstic acid
Tungstic acid CAS NUMBER 7783-03-1
Tungstic acid density: 5.5 g/mL at 25 ℃ (lit.)
Boiling point of tungstic acid: 1473°C
Tungstic acid melting point: 100℃ (dec.)
Tungstic acid flash point: 1473°C
Refractive index of tungsten acid: 2.24
Tungstic acid exact mass: 249.946213
Nominal mass of tungstic acid: 250 Da
Monoisotopic Mass of Tungstic Acid: 249.946209 Da
Average mass of tungstic acid: 249.8535 Da
Tungsten acid PSA: 74.60000
Water solubility of tungstic acid: insoluble in water
Solubility of tungstic acid (mg/mL): soluble in hydrofluoric acid, slowly soluble in caustic alkali solution, insoluble in water and other acids
Appearance of tungstic acid:
Can exist in many states. Yellow powder or crystal, etc.
Storage Conditions: Store in a cool, ventilated and dry warehouse. The packaging container is intact.
Stability: Will not decompose if used and stored according to specifications. Slightly soluble in hot water, soluble in alkali, hydrofluoric acid and ammonia, almost insoluble in acid.
It starts dehydration at 100°C, and its boiling point is 1473°C. Burning at high temperature transforms into tungsten trioxide. Insoluble in cold water and most acids, slightly soluble in hot water, soluble in alkali, hydrofluoric acid and ammonia. Orthotungstic acid or paratungstic acid solution can be treated with dilute acid to obtain colloidal tungstic acid, which contains different amounts of water, and its solubility and activity in water are greater than that of yellow tungstic acid. Powdery white tungstic acid is more active than yellow tungstic acid. It can be prepared by adding dilute nitric acid solution to tungstate solution.
Yellow tungstic acid uses:
Used in the manufacture of metal tungsten powder, powdery white tungstic acid can be used to prepare metatungstate and heteropolytungstic acid salts.
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