Ingredient
Octanediol
1,2-Octanediol
Caprylyl Glycol
What it is
Octanediol is a multifunctional diol used in skincare and haircare as a lightweight moisturizing agent and solvent that helps dissolve other ingredients and improve product texture. It is frequently paired with other glycols to boost the antimicrobial efficacy of a preservative system, letting formulators rely on gentler preservatives at lower levels.
How it works
As a small hygroscopic diol it draws and holds water at the skin surface, while its amphiphilic structure disrupts microbial cell membranes, giving it combined mild humectant and antimicrobial-boosting behaviour.
What it does
Humectant
Preservative
Solvent
Skin conditioning
Concerns to know
-
Well tolerated
No significant safety concern is reported for this ingredient as used in cosmetics.