What it is
Hexanediol is a small organic diol commonly used in skincare as a multifunctional ingredient. It can act as a solvent and humectant and is often included to support the stability and freshness of a formula, helping reduce the need for additional preservatives. It appears widely in sunscreens and leave-on products.
Safety & warnings
Hexanediol is generally well tolerated and not associated with comedogenicity. As with many solvents and glycols, very high concentrations can feel drying or cause mild sensitivity in reactive individuals, but it is well established at typical use levels.
Origin & sourcing
Synthetic; manufactured as a diol used as a multifunctional cosmetic ingredient.
Questions everyone asks
Why is hexanediol added to sunscreens?
It serves as a solvent and humectant and helps support the formula's stability and freshness, often reducing the need for other preservatives.
Does hexanediol moisturize the skin?
It has humectant properties that can help with moisture, though its main roles are as a solvent and formula-support ingredient.