High Quality Tungsten Trioxide O3W CI 77901 With Best Price Cas 1314 35 8
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- Supplier: Shandong Honrel Co. Limited
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Product Overview
Description
Product Description
CAS: 1314-35-8
MW: 231.8382
EINECS: 215-231-4
Molecular formula: O3W
tungsten(vi) oxide, puratronic
Properties:
Chemical Properties
Tungsten trioxide is a bright canary-yellow coloured powder which becomes dark-orange on heating, but regains its bright yellow colour on cooling. A very slight admixture of sodium salt imparts to the oxide a greenish tint which no amount of oxidation can remove (Roscoe). It also becomes greenish on exposure to light. Tungsten trioxide has been obtained in the crystalline state by Debray, by igniting a mixture of tungstate and carbonate of sodium in a current of hydrochloric acid, when the trioxide is obtained in olive-green rectangular prisms which sublime at a white heat. The crystalline trioxide has also been prepared by heating hydrated tungstic acid with borax in a porcelain furnace (Nordenskjold). The specific gravity of tungsten trioxide thus obtained is 6.34
Chemical Properties
Tungsten trioxide is a bright canary-yellow coloured powder which becomes dark-orange on heating, but regains its bright yellow colour on cooling. A very slight admixture of sodium salt imparts to the oxide a greenish tint which no amount of oxidation can remove (Roscoe). It also becomes greenish on exposure to light. Tungsten trioxide has been obtained in the crystalline state by Debray, by igniting a mixture of tungstate and carbonate of sodium in a current of hydrochloric acid, when the trioxide is obtained in olive-green rectangular prisms which sublime at a white heat. The crystalline trioxide has also been prepared by heating hydrated tungstic acid with borax in a porcelain furnace (Nordenskjold). The specific gravity of tungsten trioxide thus obtained is 6.34
Application:
Tungsten trioxide is a thermally stable and water insoluble tungsten compound. Tungsten trioxide andTungsten blue oxides are both used in the production of tungsten metal powders. The greatmajority of metallic tungsten is used to make cemented carbide parts, and theremainder is used in manufacturing components for lighting, electrical, electronic,heating, and welding applications; and in tool steels, alloys, catalysts, pigments, andhigh-temperature lubricants.
Specification
Grade | FWO3-1 | FWO3-2 | FWO3-3 | ||||
WO3 (%)≥ | 99.95 | 99.9 | 99.5 | ||||
Impurity content (as WO) not more than % | Pb | 0.0005 | 0.001 | / | |||
Bi | 0.0005 | 0.001 | / | ||||
Sn | 0.0007 | 0.001 | / | ||||
Sb | 0.001 | 0.001 | / | ||||
As | 0.002 | 0.002 | 0.010 | ||||
Fe | 0.001 | 0.005 | 0.010 | ||||
Al | 0.001 | 0.001 | 0.002 | ||||
Si | 0.002 | 0.003 | 0.008 | ||||
Ni | 0.0007 | 0.002 | |||||
Ca | 0.002 | 0.003 | (Ca+Mg) 0.015 | ||||
Mg | 0.001 | 0.004 | (Mg+Ca) 0.015 | ||||
K | 0.002 | 0.002 | (K+Na) 0.015 | ||||
Na | 0.002 | 0.004 | (Na+K) 0.015 | ||||
Cu | 0.0007 | 0.001 | / | ||||
Mn | 0.001 | 0.002 | / | ||||
Mo | 0.005 | 0.03 | 0.10 | ||||
P | 0.0007 | 0.004 | 0.015 | ||||
S | 0.001 | 0.001 | 0.007 | ||||
Chlorination residue | / | / | 0.07 | ||||
Loss on ignition (%) | 0.5 | 0.5 | 0.5 | ||||
Sieving size (mesh) | -40 100% | -40 100% | -40 100% | ||||
Bulk density g/cm3 | 0.5-2.5 | ||||||
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