1,2-Propanedithiol

1,2-Propanedithiol, sometimes called 1,2-dimercaptopropane, is a thiol with the formula HSCH$2$CH(SH)CH$3$. 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 H$2$S to the related episulfide, CH$3$CHCH$2$S.

Refractive index = 1.531-1.541