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ChemSpider 7560[1]
ChEBI CHEBI:8473[2]
Jmol-3D images Image 1
Molecular formula C3H8S
Molar mass 76.16 g mol−1
Appearance Colorless to pale yellow liquid with cabbage-like, sulfuraceous odor
Density 0.84 g/mL
Melting point −113 °C (−171 °F; 160 K)
Boiling point 67 to 68 °C (153 to 154 °F; 340 to 341 K)
Solubility in water Slight[3]
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Propanethiol is an organic compound with the molecular formula C3H8S. It belongs to the group of thiols. It is a colorless liquid with a strong, offensive odor. It is moderately toxic and is less dense than water and slightly soluble in water. It is used as a chemical intermediate and a herbicide.[4] It is highly flammable and it gives off irritating or toxic fumes (or gases) in a fire. Heating it will cause rise in pressure with risk of bursting.[5][6]


Propanethiol is chemically classified among the thiols, which are organic compounds with molecular formulas and structural formulas similar to alcohols, except that sulfur-containing sulfhydryl group (-SH) replaces the oxygen-containing hydroxyl group in the molecule. Propanethiol's basic molecular formula is C3H7SH, and its structural formula is similar to that of the alcohol n-propanol.


  1. ^ CSID:7560, accessed 19:05, Feb 10, 2013
  2. ^ a b ChEBI 8473
  3. ^ CDC - NIOSH Pocket Guide to Chemical Hazards
  4. ^ 1-Propanethiol,
  5. ^ 1-Propanethiol,
  6. ^ 1-Propanethiol, International Chemical Safety Card