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Ethyldichloroarsine, sometimes abbreviated as "ED" and "CY" and also known as ethyl Dick,[1] is an organoarsenic compound with the formula CH3CH2AsCl2. This colourless volatile liquid is a highly toxic obsolete vesicant or blister agent that was used during World War I in chemical warfare.[2] The molecule is pyramidal with the Cl-As-Cl and C-As-Cl angles approaching 90° (see image). Ethyldichloroarsine has high chronic toxicity, similar to lewisite.[3]
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| Names | |||
|---|---|---|---|
| Preferred IUPAC name
Ethylarsonous dichloride | |||
| Other names
ED Dichloroethylarsane; DICK | |||
| Identifiers | |||
3D model (JSmol) |
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| ChemSpider | |||
| ECHA InfoCard | 100.009.019 | ||
| EC Number |
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PubChem CID |
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| RTECS number |
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| UNII | |||
| UN number | 1892 | ||
CompTox Dashboard (EPA) |
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| Properties | |||
| C2H5AsCl2 | |||
| Molar mass | 174.8893 g/mol | ||
| Appearance | Colorless, mobile liquid | ||
| Density | 1.742 @ 14 °C | ||
| Melting point | −65 °C (−85 °F; 208 K) | ||
| Boiling point | 156 °C (313 °F; 429 K) (decomposes) | ||
| Soluble in alcohol, benzene, ether, and water | |||
| Hazards | |||
| Occupational safety and health (OHS/OSH): | |||
Main hazards |
Highly toxic, irritant | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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