Arsenic trichloride
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| Arsenic trichloride | |
|---|---|
| General | |
| Other names | Arsenic(III) chloride butter of arsenic |
| Molecular formula | AsCl3 |
| Molar mass | 181,2797 g/mol |
| Appearance | yellow-orange crystals |
| CAS number | [7784-34-1] |
| Properties | |
| Density and phase | 2.15 g/cm3, solid |
| Solubility in water | decomposes |
| Melting point | 310 °C |
| Boiling point | 707 °C |
| Vapor Pressure | 1 mm Hg (23.5 °C) |
| Hazards | |
| EU classification | not listed |
| NFPA 704 |    |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Arsenic trichloride is the chemical compound with the formula AsCl3. This colourless liquid is a starting reagent for the synthesis of organoarsenic compounds, such as triphenylarsine.
Treatment of arsenic(III) oxide with concentrated hydrochloric acid followed by distillation gives AsCl3. Thus, in contrast to PCl3, this compound has some stability in the presence of acidic water.[1]
[edit] Representative reactions
- The redistribution of As2O3 and AsCl3 gives the linear polymer AsOCl.
- With chloride sources, AsCl3, forms salts containing the anion [AsCl3−.
[edit] References
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
[edit] External links
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