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TUNGSTEN (IV) OXIDE

TUNGSTEN (IV) OXIDE Basic information
Product Name:TUNGSTEN (IV) OXIDE
Synonyms:Tungsten(IV) oxide, 99.9% (metals basis);Wolfram(IV)dioxide;Tungsten(IV) oxide -100 mesh, 99.99% trace metals basis;Tungsten(IV) oxide, 99.9% trace metals basis;Tungsten oxide (WO2);WO2;TUNGSTEN DIOXIDE;TUNGSTEN OXIDE
CAS:12036-22-5
MF:O2W
MW:215.84
EINECS:234-842-7
Product Categories:metal oxide;TungstenMetal and Ceramic Science;Catalysis and Inorganic Chemistry;Chemical Synthesis;Oxides;Tungsten
Mol File:12036-22-5.mol
TUNGSTEN (IV) OXIDE Structure
TUNGSTEN (IV) OXIDE Chemical Properties
Melting point 1500-1600°C
Boiling point 1730℃[at 101 325 Pa]
density 12,11 g/cm3
form Powder
Specific Gravity12.11
color brown
Water Solubility Soluble in acid and potassium hydroxide. Insoluble in water.
Exposure limitsACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3
CAS DataBase Reference12036-22-5(CAS DataBase Reference)
EPA Substance Registry SystemTungsten oxide (WO2) (12036-22-5)
Safety Information
Hazard Codes Xi
Risk Statements 37
Safety Statements 26-36
WGK Germany 3
TSCA Yes
MSDS Information
ProviderLanguage
SigmaAldrich English
ALFA English
TUNGSTEN (IV) OXIDE Usage And Synthesis
Chemical Propertiesbrown powder(s), may become purple on standing; formed when WO3 is reduced by H2 at 575°C–600°C [KIR83] [STR93]
UsesTungsten(IV) oxide is used in the production of tungsten and tungstates, in alloys, in fire-proofing fabrics and as a ceramic pigment. It is used to study their chromism, photocatalysis and sensing capabilities. It is associated with rhenium trioxide particles and used for detection of protonatable, radical and precharged species under laser desorption ionization.
Flammability and ExplosibilityNonflammable
TUNGSTEN (IV) OXIDE Preparation Products And Raw materials
COBALT(II) TUNGSTEN OXIDE,COBALT TUNGSTEN OXIDE MANGANESE(II) TUNGSTEN OXIDE Lithium tungsten oxide, 99.9% (metals basis),Lithium tungsten oxide, 99% min,LITHIUM TUNGSTEN OXIDE COPPER(II) TUNGSTEN OXIDE,Copper(II) tungsten oxide, 99.5% (metals basis) AMMONIUM TUNGSTATE, ORTHO NICKEL TUNGSTEN OXIDE,Nickel tungsten oxide, 99.9% (metals basis excluding Co), Co <100ppm cadmium tungsten oxide CALCIUM TUNGSTEN OXIDE SODIUM PHOSPHOTUNGSTATE Phosphotungstic acid 44-hydrate ALUMINIUM TUNGSTEN OXIDE,ALUMINUM TUNGSTEN OXIDE Magnesium tungsten oxide, 99% (metals basis),MAGNESIUM TUNGSTEN OXIDE SILVER TUNGSTEN OXIDE SILICOTUNGSTIC ACID IRON TUNGSTATE TUNGSTIC ACID LEAD TUNGSTEN OXIDE SODIUM TUNGSTATE
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