Name | divanadium tris(sulphate) |
Synonyms | vanadium trisulfate Vanadium(III) sulfate Divanadium tris(sulfate) divanadium tris(sulphate) SULFURIC ACID VANADIUM SALT |
CAS | 13701-70-7 |
EINECS | 237-226-6 |
Molecular Formula | O12S3V2 |
Molar Mass | 390.0708 |
Density | 1.99[at 20℃] |
Melting Point | decomposes ~400℃ [MER06] |
Water Solubility | very slowly dissolves in H2O at room temp; soluble HNO3 [MER06] |
Appearance | yellow powder |
UN IDs | 3288 |
Hazard Class | 6.1(a) |
Packing Group | II |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
production method | preparation method vanadium sulfate (III) can be prepared by reduction of vanadium pentoxide with sulfur in concentrated sulfuric acid V 2 O 5 + 3H 2 SO 4 + S = V 2 (SO 4) the 3 + 3H 2 O + SO 2 reaction apparatus was a 500ml three-necked flask (made of borosilicate glass) equipped with a stirrer and thermometer made of glass or polytetrafluoroethylene. 36.4g(0.2mol) of high purity vanadium pentoxide and 9.6g(0.3mol) of sulfur were charged into the reactor, and g of concentrated sulfuric acid (95-98%) was added and stirred. The mixture was heated to 170-200 ° C. With a heating mantle and kept under constant stirring for more than 16 hours. Initially, the remainder of the flask changed from brown to light blue, and finally to yellow, the yellow powder being vanadium (III) sulfate. The yellow powder was collected into a Buchner funnel and washed with 100ml of water. Unreacted sulfur can be isolated and removed as follows. The product was immersed in 100mL ethanol, 1.5 of carbon disulfide was injected and stirred at room temperature for hours. The reaction time is extended to 16 to 30H, and large particles of vanadium (III) sulfate can be obtained, and the subsequent treatment is easy to proceed. If the reaction time is less than 12h, the resulting vanadium (III) sulfate is a very fine powder, which is difficult to handle. |