Propanediol is a lightweight humectant that draws moisture into skin while helping formulas maintain their ideal texture and consistency.
Formula
C3H8O2
Mol. Weight
76.09
CAS #
504-63-2, 26264-14-2
Form
Liquid
See origin →
Functions
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Viscosity Controlling
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Moisturising
Dissolves Ingredients
Controls Viscosity
Antioxidant Protection
Reduces Inflammation
Fights Bacteria
Dissolves other ingredients
Controls product thickness
Traditional Use
Developed in the mid-20th century as a synthetic humectant and preservative booster. Created to replace glycerin in industrial and cosmetic applications where a less viscous, more stable moisture-binding agent was needed.