Methylarsine
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| Names | |
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| IUPAC name
Methylarsane[1]
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| Identifiers | |
3D model (JSmol)
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| E number | Lua error in Module:Wikidata at line 879: attempt to index field 'wikibase' (a nil value). |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| CH 3AsH 2 | |
| Molar mass | 91.973 g·mol−1 |
| Appearance | Colorless gas[2] |
| Odor | Intense garlic[2] |
| Melting point | −143 °C (−225 °F; 130 K)[3] |
| Boiling point | 2 °C (36 °F; 275 K)[2][3] |
| Hazards | |
| Main hazards | Arsenic poisoning |
| Related compounds | |
Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Methylarsine is an organoarsenic compound with the formula CH
3AsH
2. It is a colorless highly poisonous gas with a strong garlic odor.[2][4] It is the simplest organic arsine. It is the arsenic analogue of methylamine CH
3NH
2 and methylphosphine CH
3PH
2.
Methylarsine, being a compound of arsenic, carries the risk of arsenic poisoning.[1]
Synthesis
Methylarsine can be synthesized by reacting methyl chloride with potassium dihydrogen arsenide.[3]
- CH
3Cl + KAsH
2 → CH
3AsH
2 + KCl
Methylarsine can also be synthesized by reduction of methylarsonic acid by sodium borohydride.[5] It can also be prepared by reduction of methylarsine dichloride (CH
3AsCl
2) by lithium aluminium hydride.[2]
Occurrence
Methylarsine is found in some marine biological systems. It arises as a product of volatilization of methylarsonic acid by microbial activity in the environment.[6][4]
Reactions
Methylarsine reacts with potassium metal in liquid ammonia to give potassium hydrogen methylarsenide (CH
3AsH−
K+
).[3]
- 2 CH
3AsH
2 + 2 K → 2 CH
3AsHK + H
2
References
- ↑ 1.0 1.1 "Methylarsine". pubchem.ncbi.nlm.nih.gov. Retrieved 30 March 2026.
- ↑ 2.0 2.1 2.2 2.3 2.4 https://www.sciencedirect.com/science/article/abs/pii/S0022286020303628
- ↑ 3.0 3.1 3.2 3.3 https://pubs.acs.org/doi/abs/10.1021/ja01289a084
- ↑ 4.0 4.1 https://www.sciencedirect.com/science/article/abs/pii/S0003267099008922
- ↑ https://link.springer.com/article/10.1007/s00216-011-5503-4
- ↑ https://www.sciencedirect.com/science/article/abs/pii/S0025326X20308110
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