1,2-Propanedithiol, sometimes called 1,2-dimercaptopropane, is a thiol with the formula HSCH2CH(SH)CH3.

This colorless, intensely odorous liquid is the simplest chiral dithiol.

Related dithiols include 1,2-ethanedithiol, 2,3-dimercapto-1-propanesulfonic acid, and 1,3-propanedithiol.

It is generated by the addition of H2S to the related episulfide, CH3CHCH2S.

This article about an organic compound is a stub.