Tungstic acid is a yellow powder. The English name of tungstic acid is Tungstic acid. Its molecular formula is H2WO4 and its molecular weight is 249.8535. Its melting point is 100°C, and its boiling point is 1473°C. When heated to 100°C, it loses a molecule of water and turns into tungsten trioxide. Tungstic acid is slightly soluble in hot water, soluble in alkali, hydrofluoric acid and ammonia water, and almost insoluble in acid. There are many known tungstic acids, all of which are polymer compounds formed by combining tungsten trioxide WO3 with water in different ratios and in different forms.
Yellow tungstic acid is used to make metal tungsten powder, and powdery white tungstic acid can be used to prepare metatungstate and tungsten-containing heteropolysalt.
Tungstic acid has a wide range of uses, the most important role is the trial production of tungstates, and then the production of five-point and tungsten carbide powder, which is used to make metal tungsten, tungsten wire, and hard alloy; tungstic acid is also used as printing and dyeing auxiliaries and mordants , used as petrochemical catalysts, printing and dyeing auxiliaries and lubricants, used as catalysts, printing and dyeing auxiliaries and lubricants in petrochemical, food additive industry and pharmaceutical chemical industry, as well as plastic industry and ceramic industry. In addition, it is used as fabric weighting agent in textile industry. This product is used as fabric auxiliary agent. The mixture composed of tungstic acid, ammonium sulfate ammonium phosphate, etc. is used for fireproofing and waterproofing of fibers. Such fibers can be used to make fireproof rayon and rayon. Tungstic acid can also be used in leather tanning.
Generally speaking, the specific uses of tungstic acid mainly include:
- Used in mordants, analytical reagents, catalysts, water treatment chemicals, and in the manufacture of fireproof and waterproof materials, as well as phosphotungstate, borotungstate, etc.
- Used in the manufacture of metal tungsten, tungstic acid, tungstate, etc.
- Used in mordants, pigments, dyes and inks.
- It is used as fabric weighting agent in textile industry. This product is used as fabric auxiliary agent. The mixture composed of tungstic acid, ammonium sulfate ammonium phosphate, etc. is used for fireproofing and waterproofing of fibers. This fiber can be used to make fireproof rayon and rayon. It can also be used for leather tanning.
- Used for anti-corrosion of electroplating coating.
- It can be used as a cosolvent to introduce enamel pigments, which can lower the firing temperature and complement the color.
- Used in the manufacture of petroleum industry and aviation and aerospace materials.
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