(S)-(+)-1,2-Propanediol

(S)-(+)-1,2-Propanediol (CAS 4254-15-3, EC 610-039-0) is the single enantiomer form of propylene glycol, also referred to as L-1,2-Propanediol, d-Propylene glycol, and S-1,2-Propanediol. It carries no assigned E-code and is distinguished from the racemic form by its defined stereochemistry at the secondary carbon.

In personal care formulations, it functions as a humectant by drawing moisture into the stratum corneum and as a solvent that improves active ingredient delivery. In polymer systems, it acts as a crosslinker and heat stabilizer, participating in covalent network formation and retarding thermal degradation during processing.

This compound is supplied as a liquid and is available in cosmetic and pharmaceutical grades aligned with Ph.Eur. and FCC standards. It falls under REACH regulation and is classified under HS code 29053200. Procurement teams should confirm grade-specific documentation, including CoA and SDS, prior to ordering.