AS2645 Arsenic (III) Sulfide (As2S3) Powder (CAS 1303-33-9)

Catalog No. AS2645
Molecular Formula As2S3
CAS Number 1303-33-9
Appearance Yellow Powder
Purity 3N-5N

Arsenic (III) Sulfide Powder is a kind of yellow powder with a molecular formula of As2S3. Stanford Advanced Materials (SAM) is a trust-worthy supplier of high-quality Arsenic (III) Sulfide Powder.

Related Products: Barium Sulfide Powder, BaS Powder, Calcium Sulfide (CaS) Powder/Chunk/Lumps, Chromium Sulfide (Cr2S3) Powder/Chunk/Lumps, Lead Sulfide (PbS) Powder, Chunk, Lumps

Arsenic (III) Sulfide Powder Description

Arsenic (III) Sulfide Powder is the inorganic compound with the formula As2S3. It is produced in the analysis of arsenic compounds. It is a group V/VI, intrinsic p-type semiconductor and exhibits photo-induced phase-change properties. Arsenic (III) Sulfide Powder is a yellow solid that is insoluble in water. The other principal arsenic sulfide form is As4S4, a red-orange solid known as the mineral realgar.

AS2645 Arsenic (III) Sulfide Powder 


Arsenic (III) Sulfide Powder Specifications 

CAS Number


Molecular formula


Molecular weight



Yellow powder


3.43 g/cm3

Melting point

310 °C

Boiling point

707 °C

Magnetic susceptibility

-70.0·10−6 cm3/mol


Arsenic (III) Sulfide Powder Applications 

As2S3 forms when aqueous solutions containing As (III) are treated with H2S. Arsenic (III) Sulfide Powder is used as a semiconductor and in photo optic applications.


Safety Information



Signal word


Hazard statements

H301 + H311 + H331-H410

Precautionary statements

P261-P273-P280-P301 + P310-P311-P501

Personal protective equipment

dust mask type N95 (US), Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges


UN1557 - class 6.1 - PG 2 - RQ - Arsenic compounds, solid, n.o.s., HI: all (not BR)

WGK Germany




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