Vanadium(III) oxide
Vanadium(III) oxide
CAS: 1314-34-7
Molecular Formula: O3V2
Vanadium(III) oxide - Names and Identifiers
| Name | Vanadium(III) oxide |
| Synonyms | VANADIUMOXIDES VANADIUM(+5)OXIDE Divanadiumtrioxid Vanadium(III) oxide Vanadiumoxideblackpowder |
| CAS | 1314-34-7 |
| EINECS | 215-230-9 |
| InChI | InChI=1/3O.2V/rO3V2/c1-4-3-5-2 |
| InChIKey | KFAFTZQGYMGWLU-UHFFFAOYSA-N |
Vanadium(III) oxide - Physico-chemical Properties
| Molecular Formula | O3V2 |
| Molar Mass | 149.88 |
| Density | 4.87g/mLat 25°C(lit.) |
| Melting Point | 690°C(lit.) |
| Boling Point | 3000℃[at 101 325 Pa] |
| Water Solubility | Slightly soluble in water. |
| Appearance | Powder |
| Specific Gravity | 4.87 |
| Color | Black |
| Exposure Limit | NIOSH: Ceiling 0.05 mg/m3 |
| Merck | 14,9923 |
| Stability | Stable. Air sensitive. |
Vanadium(III) oxide - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R20 - Harmful by inhalation R36/37/38 - Irritating to eyes, respiratory system and skin. R36 - Irritating to the eyes |
| Safety Description | 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | UN 2862 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | YW3050000 |
| TSCA | Yes |
| HS Code | 28253090 |
| Hazard Class | 6.1 |
| Packing Group | II |
Vanadium(III) oxide - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| production method | 1. It is prepared by reduction of vanadium pentoxide with hydrogen, carbon or carbon monoxide, or by thermal decomposition of vanadium pentoxide at 1750 ° C. And calcination of Ammonium vanadate in isolated air. 2. The amorphous vanadium pentoxide produced by the thermal decomposition of ammonium metavanadate is reduced in a stream of purified hydrogen at 600 °c for 2H (the melting point of V2O5 is 690 °c, and the temperature should not exceed this melting point), the reduction was continued for 5-6h at 900 °c. A part of the product was melted with an alkali and then dissolved in dilute sulfuric acid, followed by oxidation-reduction titration with hydrogen peroxide, and it was found that the obtained product was vo1.506. This product was reduced at 1250 °c for another 4H, and then changed to V2O3. |
| category | toxic substances |
| toxicity grade | highly toxic |
| Acute toxicity | oral-mouse LD50: 23 mg/kg |
| flammability hazard characteristics | spontaneous combustion in air; Vanadium-containing compound smoke generated from fire scene |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from acids and food |
| extinguishing agent | water, sand |
| Occupational Standard | TWA 0.5 mg (vanadium pentoxide)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
