Arsenic acid (H3AsO4)

CAS Registry Number®

7778-39-4

CAS Name

Arsenic acid (H3AsO4)

Molecular Formula

AsH3O4

Molecular Mass

141.94

Cite this Page

Arsenic acid (H3AsO4).   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=7778-39-4 (retrieved 2025-05-18) (CAS RN: 7778-39-4).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Melting Point (1)

    35 °C

  • Density (1)

    ~2.2 g/cm³ (approx)

Source(s)

  • (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)

Other Names and Identifiers

InChI

InChI=1S/AsH3O4/c2-1(3,4)5/h(H3,2,3,4,5)

InChIKey

InChIKey=DJHGAFSJWGLOIV-UHFFFAOYSA-N

SMILES

[As](=O)(O)(O)O

Canonical SMILES

O=[As](O)(O)O

Other Names for this Substance

  • Arsenic acid (H3AsO4)
  • Orthoarsenic acid
  • Arsenic acid

Deleted or Replaced CAS Registry Numbers

1327-52-2, 58076-82-7

CAS INSIGHTSTM
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