Tungstic Acid

tungstic acid picture
tungstic acid picture Inquiry & Order

What is tungstic acid?

Chinese name: 钨酸
English name: Tungstic Acid
Chemical formula: H2WO4
Molecular weight： 249
Melting point：698 °C(lit.)
Density: 4.18
Solubility: 730 g/L (20 ºC)
CAS number：7783-03-1
Customs Code : 28418000
Traits: colorless crystal or white crystalline powder. Weathered in dry air, 100 ℃, lost crystal water. Dissolved in water, insoluble in ethanol. The relative density of 3.23 ~ 3.25. The temperature of 698 ° C (anhydrous).
Storage: Sealed cool and dry seal.

Tungstic acid is a yellow shiny sheet crystal or crystalline powder, soluble in water, insoluble in ethanol, slightly soluble in ammonia. Weathered in the air. Heat to 100 ° C loss of water from the crystallization of anhydrous. Reacts with strong acid (except hydrofluoric acid) to form water-insoluble yellow tungstic acid, reacts with phosphoric acid or phosphate to form phosphotungstic acid heteropolyacid complex, reacts with organic acids such as tartaric acid, citric acid and oxalic acid to form the corresponding organic acid network Compound.

Preparation

Tungsten oxide and sodium hydroxide reaction, or the use of tungsten concentrate and sodium hydroxide pressure cook to generate tungstic acid solution, the refining, filtration, ion exchange and other processes, separation of impurities, and then by evaporation of tungstic acid products.


Related Products:

APT

Ammonium Paratungstate

Ammonium paratungstate is a chemical substance, mainly white crystals, flaky or acicular two kinds, for the manufacture of tungsten trioxide or tungsten blue tungsten metal powder
ammonium metatungstate

Ammonium Metatungstate

Ammonium metatungstate is an important compound in tungsten smelting process, referred to as AMT. AMT is very versatile and can be used as a catalyst, capacitor, and nuclear shielding material.
Blue Tungsten Oxide

Blue Tungsten Oxide

Blue tungsten oxide refers to a class of dark blue compounds containing tungsten (VI) and tungsten (V) mixed valence states, the appearance of dark blue powder.
Sodium Tungstate

Sodium Tungstate

Sodium tungstate is an inorganic compound of formula Na2WO4 • 2H2O. This white, water-soluble solid is the sodium salt of ortho-tungstic acid. As a raw material for chemical synthesis of tungsten, sodium tungstate is an important intermediate in the conversion of tungsten ore to metal.
cesium tungstate bronze

Cesium Tungsten Bronze

Cesium tungsten bronze is a kind of good performance inorganic nano-material which absorbs NIR and has uniform particle size distribution. It possesses strong adsorption function in wavelength of 800-1200nm in the near infrared region and high visible light transmittance with wavelength of 380-780nm.