- Main ChemSpider page
- Molecular formula: CH4S
- Molar mass: 48.108
- CAS Registry Number: 74-93-1
- Appearance: Colorless gas with a disagreeable odor like garlic or rotten cabbage. [Note: A liquid below 43F. Shipped as a liquefied compressed gas.]; colourless gas with a garlic-like or rotten cabbage-like smell; clear liquid (at
- Melting point: -121 °C
- Boiling point: 5.9 to 6 °C
- Solubility: Water, 1.54e+004 mg/L (25 deg C)
- Safety sheet: Not available
- Spectra: NMRShiftDB 13C NMR, also check on SDBS. Add Spectra (Help).
Methanethiol (also known as methyl mercaptan) is an organosulfur compound with the chemical formula CH3SH. It is a colorless gas with a distinctive putrid smell. It is a natural substance found in the blood and brain of humans and animals, as well as in plant tissues. It is disposed of through animal feces. It also occurs naturally in certain foods, such as some nuts and cheese. It is one of the main compounds responsible for bad breath and the smell of flatus. Methanethiol is classified as a thiol and is sometimes abbreviated as MeSH. It is very flammable.
Methanethiol (IUPAC Name); Mercaptomethane; Methanethiole; Methyl Mercaptan; methylmercaptan; methyl-mercaptan; methylsulfide; Thiomethane