Arsenous acid

Arsenous acid
Structural formula
Ball-and-stick model
Names
IUPAC name
Arsorous acid
Other names
Arsenious acid
Arsenic oxide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
DrugBank
UNII
  • InChI=1S/AsH3O3/c2-1(3)4/h2-4H checkY
    Key: GCPXMJHSNVMWNM-UHFFFAOYSA-N checkY
  • InChI=1/AsH3O3/c2-1(3)4/h2-4H
    Key: GCPXMJHSNVMWNM-UHFFFAOYAA
  • O[As](O)O
Properties
H3AsO3
Molar mass 125.94 g/mol
Appearance Only exists in aqueous solutions
Conjugate base Arsenite
-51.2·10−6 cm3/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Toxic, corrosive
NIOSH (US health exposure limits):
PEL (Permissible)
 [1910.1018] TWA 0.010 mg/m3[1]
REL (Recommended)
 Ca C 0.002 mg/m3 [15-minute][1]
IDLH (Immediate danger)
 Ca [5 mg/m3 (as As)][1]
Related compounds
Related compounds
 Arsenic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Arsenous acid (or arsenious acid) is the inorganic compound with the formula H3AsO3. It is known to occur in aqueous solutions, but it has not been isolated as a pure material, although this fact does not detract from the significance of As(OH)3.[2]

  1. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0038". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ Munoz-Hernandez, M.-A. (1994). "Arsenic: Inorganic Chemistry". In King, R. B. (ed.). Encyclopedia of Inorganic Chemistry. Chichester: John Wiley & Sons.