ALUMINUM ARSENIDE Property

Melting point:

1740°C

Density 

3.81

refractive index 

2.94

form 

Powder

color 

Orange

Water Solubility 

Insoluble in water.

Crystal Structure

Cubic, Sphalerite Structure - Space Group F(-4)3m

Exposure limits

ACGIH: TWA 0.01 mg/m3
NIOSH: IDLH 5 mg/m3; Ceiling 0.002 mg/m3

CAS DataBase Reference

22831-42-1(CAS DataBase Reference)

EPA Substance Registry System

Aluminum arsenide (AlAs) (22831-42-1)

Safety

Hazard Codes 

T,N

Risk Statements 

23/25-50/53

Safety Statements 

20/21-28-45-60-61

RIDADR 

UN1557

WGK Germany 

3

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H301Toxic if swalloed

H331Toxic if inhaled

H400Very toxic to aquatic life

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P405Store locked up.

ALUMINUM ARSENIDE Chemical Properties,Usage,Production

Chemical Properties

-20 mesh powder(s) with 99.5% purity; semiconductor; band gap, 2.13eV (22°C); electronic dielectric constant, 10.3; lattice constant a=0.5662 nm; enthalpy of fusion 24.5 kJ/mol; uses: in rectifiers, transistors, and thermistors [CIC73] [ALF93] [HAW93]

Uses

Aluminum arsenide is used for the manufacture of optoelectronic devices, such as light emitting diodes. It is used in the production of some solar cells. It is also used in rectifiers, transistors, thermistors.

Definition

A semiconductor used in rectifiers, transistors, thermistors.

Hazard

Poisonous by ingestion.