Ingredient dictionary

1,2-Hexanediol

1,2-Hexanediol is a small, clear liquid that acts as a solvent, a humectant and a helper preservative in skincare and makeup. It is on the label of 147 products in our library. Checked against our library November 6, 2026.

The catch: none for most people; check the full product list if your skin reacts easily.

What 1,2-Hexanediol does

Helps different ingredients blend together
Draws water toward the skin's surface
Supports other preservatives in a formula

1,2-Hexanediol is made by industrial chemical processes, not taken directly from plants. It is a small glycol, a molecule with two hydroxyl groups, which helps it blend different ingredients together. Formulators value it as a multi-tasker: it draws in water, helps a formula stay stable, and supports the work of other preservatives.

In a finished product it is usually one part of a larger mix, not the main active. It feels light and smooth on the skin and tends to leave little residue, so it fits well in lotions, serums and makeup. It is widely used, and its job is mostly behind the scenes.

Good for

Suits most skin types and most everyday products, since it is a common, light ingredient in many formulas.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is 1,2-Hexanediol the same as hexylene glycol?

No. They have similar names but are different molecules. Hexylene glycol is a separate glycol with its own uses in skincare and makeup. Labels list them separately, so check the exact name if you are comparing products.

Does 1,2-Hexanediol help a product stay fresh?

It can help. It is used as a preservative booster, working alongside other preservatives. Good formulas rely on a full system of preservatives, not on any single ingredient.