Arsenic trioxide (As2O3)

Substance: arsenic trioxide.

Also known as: Diarsenic trioxide Arsenic(III) oxide Arsenic sesquioxide Arseneous oxide Arseneous anhydride White arsenic

Chemspider article about arsenic trioxide

Wikipedia article about arsenic trioxide

Hazard information danger

Corrosive cat. 1
Toxic cat. 1 - 3
Systemic health hazards

Hazard statements

  • Fatal if swallowed
  • Causes severe skin burns and eye damage
  • May cause cancer
  • Very toxic to aquatic life with long lasting effects

Precautionary statements

  • Obtain special instructions before use.
  • Wash … thoroughly after handling.
  • Avoid release to the environment.
  • Wear protective gloves/protective clothing/eye protection/face protection. [As modified by IV ATP]
  • IF SWALLOWED: Immediately call a POISON CENTER/doctor/… [As modified by IV ATP]
  • IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do – continue rinsing.

Experiments with this reagent