Methanesulfonyl chloride

Methanesulfonyl chloride
Names
	Preferred IUPAC name Methanesulfonyl chloride
	Other names Mesyl chloride
Identifiers
CAS Number	124-63-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	29037 ;
ECHA InfoCard	100.004.279
EC Number	204-706-1;
PubChem CID	31297;
UNII	B17EWY1R7Q ;
UN number	3246
CompTox Dashboard (EPA)	DTXSID1021615 ;
	InChI InChI=1S/CH3ClO2S/c1-5(2,3)4/h1H3 Key: QARBMVPHQWIHKH-UHFFFAOYSA-N;
	SMILES CS(Cl)(=O)=O;
Properties
Chemical formula	CH3SO2Cl
Molar mass	114.54 g·mol−1
Appearance	colorless liquid
Odor	Pungent, unpleasant
Density	1.480 g/cm3
Melting point	−32 °C (−26 °F; 241 K)
Boiling point	161 °C (322 °F; 434 K) (at 730 mmHg)
Solubility in water	Reacts
Solubility	Soluble in alcohol, ether and most organic solvents
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Lachrymator, highly toxic, corrosive
	GHS labelling:[1]
Pictograms
Signal word	Danger
Hazard statements	H290, H300, H301, H302, H311, H312, H314, H317, H330, H335, H412
Precautionary statements	P234, P260, P262, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P319, P320, P321, P330, P333+P317, P361+P364, P362+P364, P363, P390, P403+P233, P405, P501 Preview warning: Omit Rules: keep P234, omit P406 Preview warning: Omit Rules: keep P260, omit P261
Flash point	>110 °C (230 °F; 383 K)
Related compounds
Other anions	Methanesulfonyl fluoride
	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

Methanesulfonyl chloride (mesyl chloride) is an organosulfur compound with the formula CH₃SO₂Cl. Using the organic pseudoelement symbol Ms for the methanesulfonyl (or mesyl) group CH₃SO₂–, it is frequently abbreviated MsCl in reaction schemes or equations. It is a colourless liquid that dissolves in polar organic solvents but is reactive toward water, alcohols, and many amines. The simplest organic sulfonyl chloride, it is used to make methanesulfonates and to generate the elusive molecule sulfene (methylenedioxosulfur(VI)).