311383
Sigma-Aldrich

Arsenic(III) oxide

ACS reagent (primary standard), 99.95-100.05%

zoom

1 of 1

Synonym

Arsenic trioxide

Arsenous acid

Molecular Formula

As₂O₃

Molecular Weight

197.84

CAS Number

1327-53-3

MDL number

MFCD00003433

PubChem Substance ID

24858518

EG/EC Number

215-481-4

Expand/Collapse All

Descriptions

Packaging

125 g in glass btl

Properties

grade

ACS reagent (primary standard)

assay

99.95-100.05%

form

powder

ign. residue

≤0.02%

solubility

dilute HCl: ≤0.01%, insoluble

anion traces

S^2-: Passes test (lim. ~0.001%)

chloride (Cl^-): ≤0.005%

cation traces

Fe: ≤5 ppm

Pb: ≤0.002%

Sb: ≤0.05%

References

Merck

Merck 13,813

reference

Aldrich MSDS 1, 137:B / Corp MSDS 1 (1), 309:D / RegBook 1 (3), 3277:F / Sax 6, 322

Safety

Hazard Codes

T+,N

Risk Statements

45-28-34-50/53

Safety Statements

53-45-60-61

RIDADR

UN 1561 6.1/PG 2

WGK Germany

RTECS

CG3325000

Related Categories

... Routine Reagents > ACS Grade

... Catalysis and Inorganic Chemistry > Arsenic

... Oxides > Arsenic

MSDS

Specification Sheet

Certificate of Analysis

More Information