Indium(III) oxide Chemical Properties

Melting point:

2000°C

Density 

7.18 g/mL at 25 °C(lit.)

vapor pressure 

<0.01 mm Hg ( 25 °C)

Flash point:

13°(55°F)

storage temp. 

no restrictions.

solubility 

Soluble in hexane and toluene. Insoluble in alcohols

form 

nanopowder

color 

Yellow

Specific Gravity

7.179

Water Solubility 

Insoluble in water.

Crystal Structure

Sc2O3 type

crystal system

Cube

Merck 

14,4952

Space group

Ia3

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
1.0117	1.0117	1.0117	90	90	90	1.0355

Exposure limits

ACGIH: TWA 0.1 mg/m3
NIOSH: TWA 0.1 mg/m3

Stability:

Stable. Not flammable. Incompatible with acids.

CAS DataBase Reference

1312-43-2(CAS DataBase Reference)

NIST Chemistry Reference

indium(III) oxide(1312-43-2)

EPA Substance Registry System

Indium oxide (In2O3) (1312-43-2)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

RIDADR 

UN1993

WGK Germany 

3

RTECS 

NL1770000

TSCA 

Yes

HS Code 

2825 90 85

HazardClass 

3

PackingGroup 

II

MSDS

• Language:English Provider:Diindium trioxide
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Indium(III) oxide Usage And Synthesis

General Description

Indium oxide (also known as indium sesquioxide, or In2O3) is a yellow colored powder. It is a stable ceramic-like material that is insoluble in water. Indium oxide is an n-type semiconductor and thus can be used as a resistive element in integrated circuits. It also is used to form heterojunctions with materials like p-InP, n-GaAs, n-Si, and other semiconductors.
Other applications include glass (as a color additive), alkaline batteries (to suppress gas formation), and high current electrical switches and contacts (as an anti-arcing additive).

Chemical Properties

light green powder

Physical properties

Light-yellow powder; cubic crystal; occurs in both amorphous and crys-talline forms; pale-yellow amorphous form converts to crystalline form onheating at higher temperatures; isomorphous with hematite, Fe₂O₃; density7.18 g/cm³; melts around 2,000°C; insoluble in water; amorphous form dis-solves readily in mineral acids; crystalline form has low solubility in acids.

Uses

Indium(III) oxide is widely utilized as a n-type semiconductor, which is used in integrated circuits as a resistive element. It finds applications in batteries and as a part of some stain formulations. It is used as thin film coatings in optical, antistatic and infrared reflectors. It is doped with tin oxide and used as transparent conductive coatings.

Uses

In glass manufacture.

Uses

Indium trioxide is used in specialty glass production.

Preparation

Indium trioxide may be obtained by heating indium in air or oxygen:
4In + 3O₂ → 2In2O₃
or by calcination of indium hydroxide, nitrate, or carbonate at elevated tem-peratures:
2In(OH)₃ → In2O₃ + 3H₂O
In2(CO₃)₃ →In2O₃ + 3CO₂

General Description

In₂O₃/Au/Ag coated PET film

Hazard

See indium.

Purification Methods

Wash it with H2O and dry it below 850o. It volatilises at 850o and dissolves in hot mineral acids to form salts. Store it away from light because it darkens due to the formation of free In.

Indium(III) oxide(1312-43-2)Related Product Information

• ETHYLENE OXIDE
• NITRIC OXIDE
• Sulfur trioxide
• Iron oxide
• Propylene oxide
• Zinc oxide
• Indium
• Chromium(VI) oxide
• Diantimony trioxide
• INDIUM TIN OXIDE
• Magnesium oxide
• (Diethoxymethyl)diphenylphosphine oxide
• Gadolinium oxide
• Tetraterbium heptaoxide
• Titanium dioxide
• Platinum(IV) oxide
• Tantalum pentoxide
• Neodymium oxide