VANADIUM(IV) OXIDE Chemical Properties

Melting point:

1967°C

Density 

4.339 g/mL at 25 °C(lit.)

solubility 

insoluble in H2O; soluble in acid solutions, alkaline solutions

form 

Powder

Specific Gravity

4.339

color 

black

Water Solubility 

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
0.53528	0.45378	0.53825	90	115.208	90	0.1183

Exposure limits

NIOSH: Ceiling 0.05 mg/m3

CAS DataBase Reference

12036-21-4(CAS DataBase Reference)

EPA Substance Registry System

Vanadium oxide (VO2) (12036-21-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/38

Safety Statements 

26-37/39

RIDADR 

UN3285

WGK Germany 

3

F 

10-23

HazardClass 

6.1

PackingGroup 

II

HS Code 

28253090

MSDS

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VANADIUM(IV) OXIDE Usage And Synthesis

Description

Vanadium (IV) dioxide is a kind of inorganic compound with its chemical formula being VO2. It can undergo a phase transition at a normal temperature (~66 °C). Its electrical resistivity and opacity can also change several fold. These special properties make it have many applications. For example, it can be used in chemical sensors, energy-conserving coatings, transparent conductors and switching materials. It can also be used as a stationary optical shutter, optical modulators, cameras and data storage. Moreover, it can be applied to the missile guidance system due to its infrared modulation capability. It can also be used to make thin films which have been used in electro-optical switches, micro-optical switch, passive smart radiators and sunshields for spacecraft. It can also be used in phase change computing and memory.

References

https://en.wikipedia.org/wiki/Vanadium(IV)_oxide
https://www.alfa.com/en/catalog/022957/

Chemical Properties

Blue-black powder. Insoluble in water; soluble in alkalies and acids.

Chemical Properties

Vanadium(IV) Oxide (vanadium dioxide, VO2) is a blue-black solid, having a distorted rutile (TiO2) structure. It can be prepared from the reaction of V2O5 at the melting point with sulfur or carbonaceous reductants such as sugar or oxalic acid. The dioxide slowly oxidizes in air. Vanadium dioxide dissolves in acids to give the stable (VO)2+ ions and in hot alkalies to yield vanadate(IV) species, eg, (HV2O5)?.

Uses

Vanadium(IV) oxide is used in chemical sensors, energy-conserving coatings, transparent conductors and switching materials. It acts as a stationary optical shutter, optical modulators, cameras and data storage. As infrared modulators, it is used for the missile guidance systems. Thin films made up of vanadium dioxide find applications in electro-optical switches, micro-optical switch, passive smart radiators and sunshields for spacecraft.

Definition

ChEBI: Vanadium dioxide is a vanadium oxide.

Hazard

Toxic and irritating.

Flammability and Explosibility

Non flammable

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