Ingredient · Hair Waving Or Straightening · EWG: 4
Synthetic
Not Clean
2,3-Dihydroxypropyl 3-mercaptopropionate
Formula
C6H12O4S
Mol. Weight
180.22
CAS #
67874-65-1
Form
Liquid
See origin →
Functions
Hair Waving Or Straightening
Reducing
Reducing Agent
Changes hair texture
Chemical reduction
Traditional Use
A modern synthetic ingredient combining glycerin with thiopropionic acid. Developed in the 20th century as an antioxidant and preservative in cosmetic formulations.