- TUNGSTEN (IV) OXIDE
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- $1.00 / 1KG
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2019-09-02
- CAS:12036-22-5
- Min. Order: 1KG
- Purity: 85.0-99.8%
- Supply Ability: 200kg
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| | TUNGSTEN (IV) OXIDE Basic information |
| | TUNGSTEN (IV) OXIDE Chemical Properties |
| 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 | | Specific Gravity | 12.11 | | color | brown | | Water Solubility | Soluble in acid and potassium hydroxide. Insoluble in water. | | 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 | | CAS DataBase Reference | 12036-22-5(CAS DataBase Reference) | | EPA Substance Registry System | Tungsten oxide (WO2) (12036-22-5) |
| Hazard Codes | Xi | | Risk Statements | 37 | | Safety Statements | 26-36 | | WGK Germany | 3 | | TSCA | Yes |
| | TUNGSTEN (IV) OXIDE Usage And Synthesis |
| 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 | | Chemical Properties | brown powder(s), may become purple on standing; formed when WO3 is reduced by H2 at 575°C–600°C [KIR83] [STR93] | | 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. | | reaction suitability | reagent type: catalyst
core: tungsten |
| | TUNGSTEN (IV) OXIDE Preparation Products And Raw materials |
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