Arsenic (III) Oxide


Product # 1156
Name Arsenic (III) Oxide
Synonyms Arsenic trioxide, Arsenous oxide, arsenic sequioxide
Formula As2O3
Purity 99.9%
CAS Number 1327-53-3
Molecular Weight 197.84
Color & Form White powder
Boiling Point 460° C
Melting Point 312.3° C
Specific Gravity 3.738 gm/ml
Solubility Soluble


250 gm $75.00
1 kg $250.00
  • For other quantities or purities not listed, please request a quotation. We can offer many items in bulk or custom packaging.
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Transportation Information UN1561, Arsenic trioxide, 6.1, II
Pictogram Pictogram: Acute  Pictogram: Health  Pictogram: Corrosive  Pictogram: Environment 
Signal Word Danger
Hazardous Statements

H300  Fatal if swallowed.

H314  Causes severe skin burns and eye damage.

H350  May cause cancer.

H410  Very toxic to aquatic life with long lasting effects.

Precautionary Phrases

P202  Do not handle until all safety precautions have been read and understood.

P260  Do not breathe dust/fume/gas/mist/vapours/spray.

P264  Wash hands thoroughly after handling.

P270  Do not eat, drink or smoke when using this product.

P273  Avoid release to the environment.

P301+P310  IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P303+P361+P353  IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P304+P340  IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338  IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Detailed Safety and Handling Information can be found on our Safety Data Sheet (SDS).

Featured Element: Bismuth

Bismuth is a brittle crystalline which is slightly pinkish in its elemental form.

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