Methyldichloroarsine

Methyldichloroarsine
Names
	Preferred IUPAC name Methylarsonous dichloride
Identifiers
CAS Number	593-89-5 ;
3D model (JSmol)	Interactive image;
Abbreviations	MD; MDA; MDCA
ChemSpider	55089 ;
MeSH	Methyldichloroarsine
PubChem CID	61142;
CompTox Dashboard (EPA)	DTXSID0060480 ;
	InChI InChI=1S/CH3AsCl2/c1-2(3)4/h1H3 Key: VXRMBBLRHSRVDK-UHFFFAOYSA-N ; InChI=1S/CH3AsCl2/c1-2(3)4/h1H3 Key: VXRMBBLRHSRVDK-UHFFFAOYSA-N; InChI=1/CH3AsCl2/c1-2(3)4/h1H3 Key: VXRMBBLRHSRVDK-UHFFFAOYAY;
	SMILES Cl[As](Cl)C;
Properties
Chemical formula	CH3AsCl2
Molar mass	160.86 g·mol−1
Appearance	Colorless liquid
Density	1.836 g/cm3
Melting point	−55 °C (−67 °F; 218 K)
Boiling point	133 °C (271 °F; 406 K)
Solubility in water	reacts
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). verify (what is ?) Infobox references

Methyldichloroarsine, sometimes abbreviated "MD" and also known as methyl Dick, is an organoarsenic compound with the formula CH₃AsCl₂. This colourless volatile liquid is a highly toxic vesicant that has been used in chemical warfare.