ALUMINUM ARSENIDE

CAS NO.：22831-42-1
Empirical Formula: AlAs
Molecular Weight: 101.9
MDL number: MFCD00046166
EINECS: 245-255-0
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-27 23:08:55

What is ALUMINUM ARSENIDE?

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]

The Uses of ALUMINUM ARSENIDE

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.

Properties of ALUMINUM ARSENIDE

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 information for ALUMINUM ARSENIDE

Signal word	Danger
Pictogram(s)	Skull and Crossbones Acute Toxicity GHS06 Environment GHS09
GHS Hazard Statements	H301:Acute toxicity,oral H331:Acute toxicity,inhalation H400:Hazardous to the aquatic environment, acute hazard H410:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P405:Store locked up.