Ethyldichloroarsine

Ethyldichloroarsine, also known as ED, CY, and ethyl Dick,^[1] is an organoarsenic compound with the formula CH₃CH₂AsCl₂. This colourless volatile liquid is a highly toxic vesicant (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]

Ethyldichloroarsine

Names
Preferred IUPAC name Ethylarsonous dichloride
Other names ED Dichloroethylarsane; DICK
Identifiers
CAS Number	598-14-1 Y
3D model (JSmol)	Interactive image
ChemSpider	11219 Y
ECHA InfoCard	100.009.019
EC Number	209-919-3
PubChem CID	11711
RTECS number	CH3500000
UNII	4Z7627500U
UN number	1892
CompTox Dashboard (EPA)	DTXSID6060505
InChI InChI=1S/C2H5AsCl2/c1-2-3(4)5/h2H2,1H3 Key: LQSFEOMOHFPNEB-UHFFFAOYSA-N
SMILES CC[As](Cl)Cl
Properties
Chemical formula	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)
Solubility in water	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). Y verify (what is YN ?) Infobox references