CAS NO. 1314-62-1


EINECS NO. 215-239-8
MOL WT. 181.88


TOXICITY Oral rat LD50: 10 mg/kg

Anhydride vanadique; C.I. 77938; Vanadic anhydride;

Vanadium(V) oxide; Vanadium oxide; Divanadiumpentaoxid; Vanadio, pentossido di; Pentaoxido de divanadio; Pentaoxyde de divanadium; Vanadiumpentoxyde; Wanadu pieciotlenek; Wanadu pieciotlenek; h); Other RN: 12503-98-9; 56870-07-6; 87854-56-6; 87854-55-5; 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;




Catalyst, Inorganic Chemistry


PHYSICAL STATE Yellow to rust-brown flake or powder
BOILING POINT 1750 C (Decomposes)




Health: 3 Flammability: 0 Reactivity: 0



STABILITY Stable under ordinary conditions


Vanadium compounds (pentoxide and certain vanadates) are used as catalyst in the oxidation of SO2 to SO3; ethanol to acetaldehyde; in the syntheses of phthalic and maleic anhydrides; in the manufacture of polyamides (nylon); sugar to oxalic acid, and anthracene to anthraquinone. It is also used for the manufacture of yellow glass; inhibiting UV light transmission in glass; depolarizer; as developer in photography; and as mordant in dyeing and printing fabrics and in manufacture of aniline black in form of ammonium vanadate.

Wikipedia Linking:
Vanadium is used in the United Kingdom in cer- tain ferrovanadium alloys, being added in relatively small proportions at the refining stage of steelmaking. Titanium-boron-aluminium (TiBAl) rod, containing less than 1% vanadium, is used by the secondary aluminium industry as a grain refiner. The hard metals industry uses small amounts of vanadium carbide in the production of tungsten carbide tool bits. Pure vanadium, imported from outside the United Kingdom, is used in very small quan tities for research purposes.
Vanadium pentoxide is used as the catalyst for a variety of gas-phase oxidation processes, particularly the conversion of sulfur dioxide to sulfur trioxide during the manufacture of sulfuric acid. The most frequently used vanadium pentoxide catalyst contains 4–6% vanadium as vanadium pentoxide on a silica base.
Vanadium pentoxide is also used in some pigments and inks used in the ceramics industry to impart a colour ranging from brown to green. Pigments and inks are made containing up to about 15% vanadium pentoxide, the higher-concentration ones being supplied in an oil base rather than as a dry powder.
Vanadium pentoxide can be used as a colouring agent and to provide ultraviolet filtering properties in some glasses. Normally, the vanadium content in the batch materials is less than 0.5%.



Yellow to rust-brown flake

98.0% min


0.25% max


0.40% max


0.05% max

UN NO. 2862
Hazard Symbols: XN, Risk Phrases: 20, Safety Phrases: 22
Vanadium a soft, ductile, silver-grey metallic transition element in the member of group Vb of the periodic table; symbol V; Atomic number  23; atomic mass; 50.9415; melting point ca 1,890 C; boiling point ca  3,380 C; specific gravity about 6 at 20 C; valence +2, +3, +4, and maximum +5; electronic config [Ar]3d34s2; resembles chromium in properties; found in several minerals such as carnotite, patronite, roscoelite, and vanadinite with good structural strength. Vanadium has two natural isotopes, 50v and  51v, and several radioactive isotopes (46-49V,  52-54V) have been obtained artificially. It dissolves in water to form acidic solutions and dissolves in acids. It reacts with bases to form vanadates. Vanadium trioxide (V2O3) is basic in solution and dissolves in acids to give the green hexa-aquo ion (V(H2O)6)3+. In solution, V3+ is a strong reducing agent and slowly attacks water with the production of hydrogen. Vanadium is usually found bound to oxygen as a negatively charged polymeric oxyanion that tends to  complex to polarizable ligands, such as phosphorus and sulfur. Vanadium can be obtained by the extraction from ores, extraction from fossil fuels  and  extraction from slag . It has good resistance to corrosion by hydrochloric and sulfuric acids, saltwater, or alkalies at room temperature but oxidizes readily above 660 C. Vanadium has good structural strength and a low fission neutron cross section, making it useful in nuclear applications. It is intermediate between the metals and the non-metals, having either an electronegative or an electropositive metal results in numerous chemical compounds including vanadates and complex organic compounds. The principal use of vanadium is in alloys, where almost three quarters of all vanadium produced is used as additive in making special steels. It is a powerful alloying agent; a small amount adds strength, toughness and heat resistance. It is added to steel in the  form of either ferrovanadium (vanadium-iron alloy) or vanadium carbide. Vanadium  is also a major alloying element in titanium alloys for high-strength. Non-ferrous metals alloys are used in  the atomic energy industry, aircraft and space technology due to its low fission neutron cross section. Vanadium disilicide is used in the production of high-temperature refractory products. Vanadium-aluminum-titanium alloys are used in high-speed airframes and jet engines. Vanadium chemical compounds such as vanadium oxides and various vanadates are used as catalysts for the synthesis of sulfuric acid (the oxidation of SO2 to SO3) and maleic and phthalic anhydride, the oxidation reaction of organic compounds including ethanol to acetaldehyde and petroleum cracking. They are used in the manufacture of polyamides (nylon), sugar to oxalic acid and anthracene to anthraquinone. They are used as catalytic converters for the exhaust gases of internal combustion engines. They also have applications in producing glass and enamels, organic ion exchangers, luminescent compounds, synthetic rubbers, thermistors and switching  elements as well as in  producing paints, as developers, sdepolarizers, and colouring agents in photography and cinematography. They are used in inhibiting UV light transmission in glass. Vanadium compounds are used as mordants in the dyeing and printing of fabrics, particularly for  fixing  aniline black on silk (in form of ammonium vanadate) and cathode-ray tubes. Europium-activated yttrium vanadate is  used  in colour television tubes. Vanadium hydride can be used as a neutron moderator in atomic reactors. Soluble  salts of arsenous-vanadous acid  have  been  used as fungicides and insecticides. Vanadium slags are  used in casting  shops as a moulding material to improve the quality of the casting surface and to facilitate cleaning.
  • Ammonium Metavanadate [H4NO3V, CAS RN: 7803-55-6] white or slightly yellow crystalline powder; hygroscopic. Used in printing, photography, gas processing and chemical reaction.
  • Ammonium Sodium Vanadium Oxide [CAS RN: 39455-80-6]
  • Ammonium Vanadate [(NH4)3VO4, CAS RN: 11115-67-6]
  • Ammonium Vanadium Oxide
  • Bis(benzene)vanadium [C12H12V, CAS RN: 12129-72-5]
  • Bis(cyclopentadienyl)vanadium dichloride [VC10H10Cl2, CAS RN: 12083-48-6] Pale green crystals
  • Bismuth vanadium oxide [CAS RN: 53801-77-7]
  • Ferrovanadium [CAS RN: 12604-58-9]
  • Manganese Vanadium Oxide [CAS RN: 56729-39-6]
  • Potassium Metavanadate [KO3V, CAS RN: 13769-43-2]
  • Sodium Ammonium Vanadate [CAS RN: 39455-80-6]
  • Thulium Vanadium Oxide [CAS RN: 93585-68-3]
  • Sodium Metavanadate [NaVO3, CAS RN: 13718-26-8]
  • Tetracarbonylcyclopentadienylvanadium [C9H5O4V, CAS RN: 12108-04-2]
  • Tetravanadium Decaoxide [O10V4, CAS RN: 12503-98-9]
  • Tetravanadium Octaoxide [O8V4, CAS RN: 12503-87-6]
  • Vanadium Carbide [VC, CAS RN: 12070-10-9] Hard, black crystals, melting at 2800 C, boiling at 3900 C; insoluble in acids, except nitric acid; used in cutting-tool alloys and as a steel alloying agent.
  • Vanadium Diboride [VB2, CAS RN: 12007-37-3]
  • Vanadium Dicarbide [VC2, CAS RN: 12542-39-1]
  • Vanadyl Dichloride [VOCl2, CAS RN: 10213-09-9] Toxic, green crystals, soluble in alcohol and ether; decomposes in hot water; used as a reducing agent. Also known as vanadous chloride.
  • Vanadium Dimer [V2, CAS RN: 12597-60-3]
  • Vanadium Dioxide [VO2, CAS RN: 12036-21-4]
  • Vanadium Disilicide [VSi2, CAS RN: 12039-87-1]
  • Vanadium Fluoride [VF4, CAS RN: 10049-16-8]
  • Vanadium Hexacarbonyl [V(CO)6, CAS RN: 14024-00-1]
  • Vanadium Isooctanoate
  • Vanadium Monosulfide [VS, CAS RN: 12166-27-7]
  • Vanadium Monoxide [VO, CAS RN: 12035-98-2]
  • Vanadium Nitride [VN, CAS RN: 24646-85-3]
  • Vanadium Octanoate [CAS RN: 74630-99-2]
  • Vanadium Oxalate [CAS RN: 14974-48-2]
  • Vanadium Oxide: A compound of vanadium with oxygen, for example, vanadium tetroxide (V2O4), vanadium trioxide or sesquioxide (V2O3), vanadium oxide (VO), and vanadium pentoxide (V2O5).
  • Vanadium Sulfide [V2S5] A toxic, black-green powder; insoluble in water, soluble in alkalies and acids; decomposes when heated; used to make vanadium compounds. Also known as vanadic sulfide; vanadium pentasulfide.
  • Vanadium Oxide Tributoxide
  • Vanadium Oxychloride [VCl3O, CAS RN: 7727-18-6]
  • Vanadium Oxytrichloride [CAS RN: VOCl3] A toxic, yellow liquid that dissolves or reacts with many organic substances; hydrolyzes in moisture; boils at 126 C; used as an olefin-polymerization catalyst and in organovanadium synthesis.
  • Vanadium Pentoxide [CAS RN: 1314-62-1]
  • Vanadium Pentoxide [V2O5, CAS RN: 1314-62-1] A toxic, yellow to red powder, soluble in alkalies and acids, slightly soluble in water; melts at 690°C; used in medicine, as a catalyst, as a ceramics coloring, for ultraviolet-resistant glass, photographic developers, textiles dyeing, and nuclear reactors. Also known as vanadic acid anhydride.
  • Vanadium Silicate [CAS RN: 12653-89-3]
  • Vanadium Silicide [SiV3, CAS RN: 12039-76-8]
  • Vanadium Sulfide; [V2S5] Toxic, black-green powder; insoluble in water, soluble in alkalies and acids; used to make vanadium compounds.
  • Vanadium Tetrabutoxide [CAS RN: 6167-45-9]
  • Vanadium Tetrachloride [VCl4, CAS RN: 7632-51-1] A toxic, red liquid; soluble in ether and absolute alcohol; boils at 154°C; used in medicine and to manufacture other vanadium comounds; used as a catalyst to produce rubbers and polyolefins and as a fixative in dying.
  • Vanadium Tetrafluoride [VF4, CAS RN: 10049-16-8]
  • Vanadium Tetraisopropoxide
  • Vanadium Tetraoxide [V2O4, CAS RN: 12036-73-6] A toxic blue-black powder; insoluble in water, soluble in alkalies and acids; melts at 1967°C; used as a catalyst.
  • Vanadium Trichloride [VCl3, CAS RN: 7718-98-1] Toxic pink crystals; soluble in ether and absolute alcohol; decomposes in water and when heated; used to prepare vanadium and organovanadium compounds (esterfication and transesterfication catalyst); used as a catalyst in the polymerization of olefins, epoxy, phenolic and silicone resins.
  • Vanadium Trichlorooxo
  • Vanadium Trifluoride [CAS RN: 10049-12-4]
  • Vanadium Trioxide [V2O3, CAS RN: 1314-36-7] Toxic, black crystals; soluble in alkalies and hydrofluoric acid, slightly soluble in water; melts at 1970 C; used as a catalyst.
  • Vanadium Trichloride [VCl3] Toxic, deliquescent, pink crystals; soluble in ether and absolute alcohol; decomposes in water and when heated; used to prepare vanadium and organovanadium compounds.
  • Vanadocene [VC10H10, CAS RN: 1277-47-0]
  • Vanadyl Acetylacetonate [VC10H14O5, CAS RN: 3153-26-2]
  • Vanadyl Chloride [V2O2Cl4] Toxic, deliquescent, water- and alcohol-soluble green crystals; used to mordant textiles.
  • Vanadyl Dichloride [VOCl2, CAS RN: 10213-09-9]
  • Vanadyl Naphthenate [CAS RN: 68553-60-6]
  • Vanadyl Octaethylporphine [VC36H44N4, CAS RN: 27860-55-5]
  • Vanadyl Oxalate [CAS RN: 15500-04-6] Used as a catalyst to remove sulfur and nitrogen in oil refinery and other chemical production processes.
  • Vanadyl Etioporphyrin III [VC32H36N4O, CAS RN: 25878-85-7]
  • Vanadyl Mesotetraphenylporphine [VC44H28N4, CAS RN: 14705-63-6]
  • Vanadium Oxytrichloride [VOCl3 , CAS RN: 7727-18-6] Toxic, corrosive yellow liquid; emits red fumes on exposure to air; used as a catalyst to produce rubbers and polyolefins and as a mordant in dying.
  • Vanadyl Phthalocyanine [VC32H16N8O, CAS RN: 13930-88-6]
  • Vanadyl Sulfate [ VOSO4, CAS RN: 27774-13-6, 123334-20-3] Blue crystals, toxic, very soluble in water; used as a reducing agent, catalyst, glass and ceramics colorant, mordant and pharmaceuticals.