Sodium methanethiolate

For sodium 2-mercaptoethanesulfonate, see Mesna.

Sodium methanethiolate

Names
Preferred IUPAC name Sodium methanethiolate
Other names sodium thiomethoxide, sodium methyl mercaptide, sodium thiomethylate, methanethiol sodium salt, methyl mercaptan sodium salt
Identifiers
CAS Number	5188-07-8 Y
3D model (JSmol)	Interactive image
ChemSpider	71198 Y
ECHA InfoCard	100.023.609
EC Number	225-969-9
PubChem CID	4378561
UNII	LB29JWW8H7 N
CompTox Dashboard (EPA)	DTXSID7027592
InChI InChI=1S/CH4S.Na/c1-2;/h2H,1H3;/q;+1/p-1 Y Key: RMBAVIFYHOYIFM-UHFFFAOYSA-M Y InChI=1/CH4S.Na/c1-2;/h2H,1H3;/q;+1/p-1
SMILES [Na+].[S-]C
Properties
Chemical formula	CH3NaS
Molar mass	70.08 g·mol−1
Appearance	yellow-red
Solubility in water	soluble
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Sodium methanethiolate or sodium thiomethoxide (CH₃SNa, MeSNa) is the sodium conjugate base of methanethiol. This compound is commercially available as a white solid. It is a powerful nucleophile that can be used to prepare methylthioether and other organic compounds like ethyl bromide. Its hydrolysis in moist air produces methanethiol, which has a low odor threshold and a noxious fecal smell.