Arsenic trioxide

CAS Registry Number®

1327-53-3
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CAS Name

Arsenic trioxide

Molecular Formula

As2O3

Cite this Page

Arsenic trioxide.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?ref=1327-53-3 (retrieved 2021-12-01) (CAS RN: 1327-53-3).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Boiling Point (1)

    460 °C
  • Melting Point (2)

    275-313 °C
  • Density (2)

    3.7-4.2 g/cm3

Source(s)

  • (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)
  • (2) International Chemical Safety Cards data were obtained from the National Institute for Occupational Safety and Health (US)

Other Names and Identifiers

Other Names for this Substance

  • Arsenic oxide (As2O3)
  • Arsenic sesquioxide
  • Arsenic trioxide
  • Arsenous oxide
  • White arsenic

Deleted or Replaced CAS Registry Numbers

28380-38-3, 856307-43-2