| Arsenic pentoxide | |
|---|---|
| Arsenic pentoxide | |
| Other names | Arsenic(V) oxide Arsenic oxide Arsenic anhydride |
| Identifiers | |
| CAS number | 1303-28-2 |
| EINECS number | |
| 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 |
 0
3
2
|
| R-phrases | Plantilla:R45, Plantilla:R23/25, Plantilla:R50/53 |
| S-phrases | Plantilla:S53, Plantilla: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 references | |
Arsenic pentoxide, As2O5, is an important commercial compound of arsenic. Its usage with respect to arsenic chemistry, as well as its toxicology are similar to arsenic trioxide, As2O3. Arsenic pentoxide is used as a solid or as a solution in the manufacturing of arsenates, weed killer, metal adhesives, insecticides, fungicides, wood preservatives, and colored gases and in printing and dyeing.[1]
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]
Reactions[]
Arsenic pentoxide decomposes to oxygen and As2O3 upon heating.[2] As2O5 dissolves readily in water to form arsenic acid, H3AsO4.[3]
Bibliography[]
Arsenic: Medical and Biological Effects of Environmental Pollutants (1977)
References[]
- ↑ Arsenic Pentoxide, Systemic Agent. National Institute for Occupational Safety and Health. Emergency Response Safety and Health Database. August 22, 2008. Retrieved December 22, 2008.
- ↑ Martin Jansen (1977). "Crystal Structure of As2O5". Angewandte Chemie International Edition in English 16 (5): 314–315. DOI:10.1002/anie.197703142.
- ↑ Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements (2nd Edition ed.). Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4. pp. 576-577
External links[]
- Arsenic Pentoxide. National Institute for Occupational Safety and Health.
- International Chemical Safety Card 0377
- NIOSH Pocket Guide to Chemical Hazards
- IARC Monograph – Arsenic and Arsenic Compounds
- NTP Report on Carcinogens – Inorganic Arsenic Compounds
- Plantilla:Ecb
- Plantilla:Inrs
- Plantilla:Nist
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