Chemistry:Arsenic dioxide

From HandWiki
Arsenic dioxide
Names
IUPAC name
Arsenic(III,V) dioxide
Identifiers
3D model (JSmol)
ChemSpider
Properties
AsO2 (As2O4)
Molar mass 106.920 g/mol
Hazards
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]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Arsenic dioxide is an inorganic compound with the chemical formula As2O4, containing As(III) and As(V), AsIIIAsVO4.[2]

Synthesis

It can be synthesized in an autoclave via the following reaction:

2 As2O3 + O2 → 2 As2O4

Structure

It adopts a layer structure, and the coordination geometry of As(III) is triangular pyramid while As(V) is tetrahedral.[2]

References

  1. 1.0 1.1 1.2 NIOSH Pocket Guide to Chemical Hazards. "#0038". National Institute for Occupational Safety and Health (NIOSH). https://www.cdc.gov/niosh/npg/npgd0038.html. 
  2. 2.0 2.1 Jones, P. G.; Beesk, W.; Sheldrick, G. M.; Sharman, E. (14 February 1980). "Arsenic dioxide". Acta Crystallographica Section B 36 (2): 439–440. doi:10.1107/S0567740880003433.