Ingredient dictionary

C12-15 Alkyl Benzoate

A light, fast-absorbing ester made from benzoic acid and C12-15 fatty alcohols. It mainly acts as an emollient and solvent, softening skin and dissolving other ingredients. It is on the label of 89 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 C12-15 Alkyl Benzoate does

Softens and smooths the skin's surface
Dissolves and spreads UV filters evenly
Leaves a silky, non-greasy finish

C12-15 Alkyl Benzoate is made by reacting benzoic acid with a blend of C12 to C15 fatty alcohols. The fatty alcohols can come from plant or synthetic sources, and the result is a clear liquid that spreads easily on skin.

Formulators use it because it feels light and absorbs quickly, leaving a smooth finish rather than a greasy film. It also dissolves many UV filters and other solids, so sunscreens and makeup stay evenly mixed. In eyeliner and deodorant, it helps keep the texture soft and easy to apply.

Good for

Suits everyday moisturizers, sunscreens and makeup for people who like a light, silky feel rather than a heavy, greasy one.

Be careful if

Nothing in particular for most skin types.

Frequently asked questions

Is C12-15 Alkyl Benzoate safe for skin?

It is a widely used cosmetic ingredient and is not in any of the ingredient groups Beauty Comparison flags for extra caution. Like any new product, patch testing on a small area first is a sensible habit, especially for sensitive skin.

Why is it in my sunscreen?

It helps dissolve the UV filters that protect skin from sunlight, so they stay evenly mixed and spread smoothly. It also gives the sunscreen a lighter, less greasy feel. Its job is supporting the formula, not providing the sun protection itself.