Ammonium metatungstate hydrate is a chemical compound with well-defined chemical properties and multiple applications. Below is a detailed explanation of ammonium metatungstate hydrate:
Basic information of Ammonium metatungstate hydrate
Name: Ammonium metatungstate hydrate
Chemical formula of Ammonium metatungstate hydrate: (NH₄)₆H₂W₁₂O₄₀-xH₂O, in which x denotes the amount of water of crystallization, which may vary depending on the conditions of preparation and the storage environment.
CAS No. of Ammonium metatungstate hydrate: 12333-11-8
Molecular weight of ammonium metatungstate hydrate: 2956.30 (the value may vary depending on the amount of crystallization water)
Appearance of ammonium metatungstate hydrate: usually white to off-white powder.
Physical properties of ammonium metatungstate hydrate
Water solubility of ammonium metatungstate hydrate
Ammonium metatungstate hydrate has good water solubility, which is an important difference between it and other tungsten compounds (e.g. ammonium sec-tungstate).
Melting point of ammonium metatungstate hydrate
Approx. 100°C (this value may vary slightly depending on the amount of water of crystallization)
Chemical properties of ammonium metatungstate hydrate
Ammonium metatungstate hydrate is a compound formed by combining ammonium metatungstate and water of crystallization, which can dissociate ammonium metatungstate ions and hydroxide ions in water.
Application of Ammonium Metatungstate Hydrate
Ammonium metatungstate hydrate is an important chemical substance with a wide range of applications in industry, scientific research and catalyst preparation.
Industrial application
Ammonium metatungstate hydrate is widely used in the manufacture of tungsten metal, alloy steel, fire-resistant fabrics, etc., and is an important raw material for the ceramic industry.
Catalyst Preparation
It is also used as the main raw material of tungsten-based catalysts in oil refineries, and in the manufacture of various petrochemical catalysts and other tungsten compounds.
Scientific Research
Ammonium metatungstate hydrate is also used for research in scientific and chemical disciplines, as well as in semiconductor and other high-tech fields.
Safety Information of Ammonium Metatungstate Hydrate
Ammonium metatungstate hydrate should be regarded as a hazardous substance and the relevant safety practices should be observed. Appropriate protective measures, such as wearing protective clothing, gloves and goggles, should be taken when contacting or handling the substance.
Preparation of ammonium metatungstate hydrate
Ammonium metatungstate hydrate is prepared by various methods, mainly including ammonium tungstate solution or sodium tungstate solution as raw material, through solvent extraction, ion exchange method, neutralization method or thermal decomposition method.
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