311383

Arsenic(III) oxide

ACS reagent (primary standard)

• Synonym(s): Arsenic trioxide, Arsenous acid
• 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

Properties

• 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: S^2-: 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

Description

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.

Safety Information

• Pictograms: GHS06,GHS08,GHS05,GHS09
• Signal Word: Danger
• Hazard Statements: H300,H314,H350,H372,H410
• Precautionary Statements: P260 - P273 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• 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