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Sigma-Aldrich

Arsenic(III) oxide

ACS reagent (primary standard)

Synonym(s):

Arsenic trioxide, Arsenous acid

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About This Item

Empirical Formula (Hill Notation):
As2O3
CAS Number:
1327-53-3
Molecular Weight:
197.84
EC Number:
215-481-4
MDL number:
MFCD00003433
UNSPSC Code:
12171602
PubChem Substance ID:
329753664
NACRES:
NB.24

grade

ACS reagent (primary standard)

vapor pressure

0 hPa ( 66 °C)

Assay

99.95-100.05%

form

powder

reaction suitability

reagent type: catalyst
core: arsenic

ign. residue

≤0.02%

solubility

dilute HCl: insoluble ≤0.01%

anion traces

S2-: passes test (lim. ~0.001%)
chloride (Cl-): ≤0.005%

cation traces

Fe: ≤5 ppm
Pb: ≤0.002%
Sb: ≤0.05%

SMILES string

O=[As]O[As]=O

InChI

1S/As2O3/c3-1-5-2-4

InChI key

IKWTVSLWAPBBKU-UHFFFAOYSA-N

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General description

Arsenic (III) oxide, also referred to as arsenic trioxide, is an amphoteric oxide that is used as a raw material to produce several arsenic-based compounds.

Application

Arsenic (III) oxide is used
  • In the synthesis of arsenic pentafluoride (AsF5) by static fluorination method in a closed system.
  • In the preparation of arsenic-doped ZnO films by adding As2O3 to zinc acetate, 2-methoxyethanol, and monoethanolamine by sol-gel spin coating method.

Signal Word

Danger

Hazard Statements

H300,H314,H350,H372,H410

Hazard Classifications

Acute Tox. 2 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1A - Eye Dam. 1 - Skin Corr. 1B - STOT RE 1

Target Organs

Respiratory system,Cardio-vascular system,Gastrointestinal tract

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH SVHC Candidate List

CAS No.

EU REACH Annex XVII (Restriction List)

CAS No.

EU REACH Annex XIV (Authorisation List)

CAS No.

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Xiao Liu et al.
Science China. Life sciences, 63(11), 1744-1754 (2020-05-10)
This study aimed to explore macrophage polarization in acute graft-versus-host disease after hematopoietic stem cell transplantation, and investigated if arsenic trioxide (ATO) could correct this imbalance. In the colon of GVHD mice, we found that the number of F4/80+iNOS+ cells
Shaohong Fang et al.
Cell death & disease, 12(1), 88-88 (2021-01-20)
Inducing autophagy and inhibiting apoptosis may provide a therapeutic treatment for atherosclerosis (AS). For the treatment of progressive AS, arsenic trioxide (ATO) has been used to coat vascular stents. However, the effect of ATO on autophagy of macrophages is still
Ling-Huei Yih et al.
Toxicology and applied pharmacology, 267(3), 228-237 (2013-01-29)
Accumulated evidence has revealed a tight link between arsenic trioxide (ATO)-induced apoptosis and mitotic arrest in cancer cells. AKT, a serine/threonine kinase frequently over-activated in diverse tumors, plays critical roles in stimulating cell cycle progression, abrogating cell cycle checkpoints, suppressing
Cui Li et al.
Toxicology letters, 219(3), 223-230 (2013-04-02)
Arsenic trioxide (As2O3; ATO) is clinically effective in treating acute promyelocytic leukemia (APL); however, it frequently causes cardiotoxic effects. This study was designed to investigate whether ATO could induce apoptosis of cardiac fibroblasts (CFs) that play very important roles in
Athena Kritharis et al.
Annals of hematology, 92(6), 719-730 (2013-03-16)
For more than 2,000 years, arsenic and its derivatives have shown medical utility. Owing to the toxicities and potential carcinogenicity of arsenicals, their popularity has fluctuated. The exact mechanism of action of therapeutic arsenic is not well characterized but likely
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