S-Methyl methanethiosulfonate

S-Methyl methanethiosulfonate
Names
	IUPAC name Methylsulfonylsulfanylmethane
	Other names S-Methyl methanethiosulfonate; S-Methyl methanesulfonothioate; Methanesulfonothioic acid, S-methyl ester; MMTS;
Identifiers
CAS Number	2949-92-0;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:74357;
ChEMBL	ChEMBL1236925;
ChemSpider	17065;
ECHA InfoCard	100.019.064
EC Number	220-970-0;
PubChem CID	18064;
UNII	0906Z2356U;
CompTox Dashboard (EPA)	DTXSID8062739 ;
	InChI InChI=1S/C2H6O2S2/c1-5-6(2,3)4/h1-2H3 Key: XYONNSVDNIRXKZ-UHFFFAOYSA-N;
	SMILES CSS(=O)(=O)C;
Properties
Chemical formula	CH3SO2SCH3
Molar mass	126.19 g·mol−1
Appearance	Colorless liquid
Odor	Stench
Density	1.337 g/cm3
Boiling point	266 to 267 °C (511 to 513 °F; 539 to 540 K) (69 to 71 °C at 0.5 hPa)
Solubility in water	slightly
Solubility	ethanol
Vapor pressure	1.87 Pa
Refractive index (nD)	1.513 at 20 °C
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Serious eye damage
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H315, H317, H319, H335
Precautionary statements	P261, P264, P265, P271, P272, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
Flash point	87 °C
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	9.11 mg/kg (mouse, intraperitoneal)
Related compounds
Related compounds	Methyl methanesulfonate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

S-Methyl methanethiosulfonate, also known as MMTS, is an organosulfur compound with the chemical formula C H₃−S O₂−S−CH₃. It is the S-methyl ester of methanethiosulfonic acid. It is a colorless liquid. It is obtained by condensation of methanesulfonic acid with methanethiol.

CH₃SO₂OH + CH₃SH → CH₃SO₂SCH₃ + H₂O