Vanadium oxide (V2O5)
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Vanadium oxide (V2O5)
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CAS No:
1314-62-1
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Formula:
O5V2
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Chemical Name:
Vanadium oxide (V2O5)
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Synonyms:
Vanadium oxide (V2O5);C.I. 77938;Vanadic anhydride;Vanadium pentoxide;Divanadium pentoxide;Divanadium pentaoxide;Vanadium oxide;Vanadia;Pentaoxodivanadium;Vanadium(V) oxide;Vanadium oxide (V4O10);VT 1;VT 1 (colorant);Vanadium oxide (VO2.5);Red vanadium;12503-98-9;56870-07-6;87854-55-5;87854-56-6;166165-37-3;172928-47-1;184892-22-6;200577-85-1;203812-34-4;251927-12-5;410546-90-6;581075-33-4;828264-64-8;854372-97-7;857777-38-9;863639-26-3;934750-46-6;1408062-28-1;2142684-30-6
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CAS No:
Description
Vanadium oxide (V2O5), brown-yellow orthorhombic crystals, density is 3.35g/cm3; melting point is 670℃, decomposition point is 1800℃. It is slightly soluble in water, 0.8g/100mL at 20℃, soluble in concentrated acid to form orange-yellow solution, soluble in alkali to form vanadate. Vanadium oxide (V2O5) produces toxic fumes when heated and decomposed. Vanadium is widely distributed in various minerals and fossil fuels in the earth's crust. Vanadium oxide (V2O5) is the oxide form of vanadium and is the main commercial product of vanadium, mainly used in the production of iron and aluminum alloys. As an important vanadium compound, it is used as the main precursor of vanadium alloys and is widely used as an industrial catalyst.
Characteristics
77.5
-0.54360
Orange turnings
3.357 g/cm3 @ Temp: 18 °C
690 °C
3380 °C(lit.)
1750°C
H2O: 1 g/125 mL;
Poison room
8 mm Hg ( 20 °C)
Oral-rat LD50: 10 mg/kg; Oral-Mouse LD50: 23 mg/kg
Emissions of toxic vanadium-containing compounds on fire
A mixture of the metal and oxidant, contaminated with sulfur and some water led to a serious fire.
Odorless
pH = 2.7, saturated aqueous solution at 20 °C
Safety Information
III
8
UN 3289 6.1/PG 2
3
36/38-68-63-51/53-48/23-37-20/22-41-48/20-34-40-26/27/28
26-61-45-38-36/37-36-36/37/39-23
YW1355000
Xi,N,T,C,T+
Treasury is ventilated, low temperature and dry; stored and transported separately from acids and food
Vanadium usually occurs in the pentavalent state. Pentavalent vanadium is stable in aqueous solutions over a wide range of pH. /Pentavalent vanadium compounds/
P201, P202, P260, P261, P264, P270, P271, P273, P280, P281, P301+P312, P304+P312, P304+P340, P305+P351+P338, P308+P313, P310, P312, P314, P330, P391, P403+P233, P405, P501
H302
Vanadium oxide (V2O5) Use and Manufacturing
Direct method vanadium fine powder and soda ash are roasted at high temperature to produce sodium metavanadate, which is added with sulfuric acid to neutralize under heating and stirring to prepare vanadium pentoxide. Its 4(FeO?V2O5)+4Na2CO3+3O2→2Fe2O3+8NaVO3+4CO2↑2NaVO3+H2SO4→Na2SO4+V2O5+H2O indirect method vanadium ore and sodium chloride are formed into balls and then oxidized and roasted to obtain sodium metavanadate and hydrochloric acid It produces crude vanadium pentoxide, which is then treated with sodium hydroxide and ammonium chloride to obtain ammonium metavanadate. The ammonium metavanadate is heated to 500°C for roasting and decomposition to produce vanadium pentoxide. Its 4(FeO?V2O5)+8NaCl+3O2→2Fe2O3+8NaVO3+4C12↑2NaVO3+2HCl+H2O→2NC1+V2O5+2H2OV2O5+2NaOH→2NaVO3+H2ONaVO3+NH4C1→NaCl+NH4VO3↓2NH4VO2+NH3VO2+ ↑
As catalyst in the oxidation of SO2 to SO3, alcohol to acetaldehyde, etc.; for the manufacture of yellow glass; inhibiting ultraviolet light transmission in glass; depolarizer; as developer in photography; in form of ammonium vanadate as mordant in dyeing and printing fabrics and in manufacture of aniline black.
Computed Properties
Molecular Weight:181.88
Hydrogen Bond Acceptor Count:5
Exact Mass:181.862488
Monoisotopic Mass:181.862488
Topological Polar Surface Area:77.5
Heavy Atom Count:7
Complexity:124
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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