| Identification | More | [Name]
TUNGSTEN (IV) OXIDE | [CAS]
12036-22-5 | [Synonyms]
TUNGSTEN DIOXIDE
TUNGSTEN (IV) OXIDE
TUNGSTEN OXIDE
Tungsten oxide (WO2)
WO2
TUNGSTEN(IV) OXIDE,-100 MESH, 99.99%
TUNGSTEN (IV) OXIDE (99.9%-W)
WO2,99.9%(metalsbasis)
Tungsten(Ⅳ)oxide
TUNGSTEN(IV) OXIDE: 99.9%,-150 MICRON
TUNGSTEN(IV) OXIDE: 99.9%
Tungsten(IV) oxide, 99.9% (metals basis)
Wolfram(IV)dioxide | [EINECS(EC#)]
234-842-7 | [Molecular Formula]
O2W | [MDL Number]
MFCD00049709 | [Molecular Weight]
215.84 | [MOL File]
12036-22-5.mol |
| Chemical Properties | Back Directory | [Melting point ]
1500-1600°C | [Boiling point ]
1730℃[at 101 325 Pa] | [density ]
12,11 g/cm3 | [solubility ]
insoluble in H2O, organic solvents | [form ]
Powder | [color ]
brown | [Specific Gravity]
12.11 | [Water Solubility ]
Soluble in acid and potassium hydroxide. Insoluble in water. | [Specific Heat Capacity]
Cp(crystal):0.259915J/(g·K),at 25℃ | [Crystal Structure]
MoO2 type | [crystal system]
Monoclinic | [Space group]
P21/c | [Lattice constant]
| a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 0.5563 | 0.4896 | 0.5663 | 90 | 120.657 | 90 | 0.1327 |
| [Exposure limits]
ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 | [InChI]
1S/2O.W | [InChIKey]
DZKDPOPGYFUOGI-UHFFFAOYSA-N | [SMILES]
O=[W]=O | [CAS DataBase Reference]
12036-22-5(CAS DataBase Reference) | [EPA Substance Registry System]
Tungsten oxide (WO2) (12036-22-5) |
| Hazard Information | Back Directory | [Chemical Properties]
brown powder(s), may become purple on standing; formed when WO3 is reduced by H2 at 575°C–600°C [KIR83] [STR93] | [Description]
Tungsten(IV) oxide, WO2, is a bronze-colored solid that crystallizes in a monoclinic cell. The rutile-like structure features distorted octahedral WO6 centers with alternate short W-W bonds (248 pm). Each tungsten center has the d2 configuration, which gives the material a high electrical conductivity. WO2 is prepared by reduction of WO3 with tungsten
powder in about 40 h at 900℃. An intermediate in this reaction is the partially reduced, mixed valence species W18O49.
2WO3 + W→3WO2 | [Uses]
Tungsten(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 Explosibility]
Nonflammable | [reaction suitability]
reagent type: catalyst
core: tungsten |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R37:Irritating to the respiratory system. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [WGK Germany ]
3
| [TSCA ]
Yes | [REACH Registrations]
Active | [Storage Class]
11 - Combustible Solids |
|
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J & K SCIENTIFIC LTD.
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Alfa Aesar
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Energy Chemical
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Spectrum Chemical Manufacturing Corp.
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Sigma-Aldrich
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