Arsenic pentoxide

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Arsenic pentoxide
Image:Arsenic pentoxide.png
Other names Arsenic(V) oxide
Arsenic oxide
Arsenic anhydride
Identifiers
CAS number 1303-28-2
EINECS number 033-004-00-6
Properties
Molecular formula As2O5
Molar mass 229.8 g/mol
Appearance white hygroscopic powder
Density 4.3 g/cm3, solid
Melting point

315 °C (decomposes)

Hazards
EU classification Very toxic (T+)
Carc. Cat. 1
Dangerous for the environment (N)
NFPA 704
R-phrases R45, R23/25, R50/53
S-phrases S53, S45, S60, S61
Related Compounds
Other cations Phosphorus pentoxide
Antimony pentoxide
Related compounds Arsenic trioxide
Arsenic acid
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Arsenic pentoxide is an important commercial compound of arsenic. Its usage with respect to arsenic chemistry, as well as its toxicology are similar to arsenic trioxide.

Contents

[edit] Synthesis

Arsenic pentoxide can be synthesized either by burning elemental arsenic in surplus of oxygen, or by oxidizing arsenic trioxide with oxidizing agents such as ozone, hydrogen peroxide and nitric acid.[citation needed]

[edit] Reactions

Arsenic pentoxide decompose to oxygen and As2O3 upon heating. As2O5 dissolves readily in water to form arsenic(V) acid.

[edit] Bibliography

Arsenic: Medical and Biological Effects of Environmental Pollutants (1977)

[edit] References

This article does not cite any references or sources. (September 2007)
Please help improve this article by adding citations to reliable sources. Unverifiable material may be challenged and removed.


[edit] External links

de:Arsen(V)-oxid

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