Tungsten trioxide CAS 1314-35-8

CAS:1314-35-8
Molecular formula:O3W
Molecular weight:231.84
Appearance: Light yellow powder
EINECS：215-231-4

Synonyms:CI77901; TUNGSTENTRIOXIDE99.999%; TUNGSTENTRIOXIDE,99.5%; Tungsten(VI)oxide(99.9994%W)PURATREM; Tungsten(VI)oxide(Chemicalbookmin.99.8%-W)

What is Tungsten trioxide CAS 1314-35-8？

Tungsten trioxide CAS 1314-35-8 and blue tungsten oxide are two common tungsten oxides at present. Tungsten trioxide is also known as tungsten oxide and has the chemical formula WO3. Light yellow triclinic powder crystal. When the temperature is higher than 740°C, it transforms into an orange tetragonal crystal, and returns to its original shape after cooling. It is stable in air, with a melting point of 1473°C, a boiling point higher than 1750°C, and a relative density of 7.16. Tungsten trioxide is the most stable type of tungsten oxide. It is insoluble in water and inorganic acids except hydrofluoric acid. It can be dissolved in hot concentrated sodium hydroxide solution and ammonia water to form soluble tungstate. When the temperature is higher than 650℃, it can be reduced by H2, and at 1000~1100℃, it can be reduced by C to obtain tungsten powder.

Specification

Item	Standard	Result
WO₃	≥99.9%	99.95%
Pb	≤0.0001%	0.0001%
Bi	≤0.0001%	0.0001%
Sb	≤0.0005%	0.0004%
As	≤0.005%	0.005%
Fe	≤0.005%	0.005%
Al	≤0.0005%	0.0005%
Si	≤0.001%	0.0009%
Ni	≤0.0007%	0.0006%
Ca	≤0.001%	0.001%
Mg	≤0.0007%	0.0005%
Mo	≤0.02%	0.018%
K	≤0.005%	0.005%
Na	≤0.005%	0.005%
Cu	≤0.0003%	0.0003%
Mn	≤0.001%	0.0005%
P	≤0.0007%	0.0006%
S	≤0.0007%	0.0005%

Application

Used to make metal tungsten, alloy steel, fire-proof fabrics, etc., and used in the ceramic industry
Used as analytical reagents and also used in the preparation of metal tungsten and tungsten salts
Used as raw material for making tungsten metal. Used for making cemented carbide, drawing tungsten wire, powder metallurgy, making x-ray screens and fireproof fabrics. It can also be used as a colorant and analytical reagent for ceramics.
It can be used as a raw material for making tungsten metal, making cemented carbide, cutting tools, molds and drawn tungsten wires. It can also be used for powder metallurgy. It can also be used for X-ray screens and fireproof fabrics, as well as for colorants and analysis of ceramics. Reagents, etc.
Blue tungsten oxide is used to produce tungsten powder, doped tungsten powder, tungsten strips, tungsten rods, …. and cemented carbide, etc. Yellow tungsten oxide is used in electrodes and the production of other cobalt products, barometers, and hydrometers.

Tungsten-trioxide-application