Alcohol Denat.

Alcohol Denat. is ethanol that has been rendered undrinkable through the addition of denaturing agents (typically bittering compounds) to comply with tax and regulatory requirements. In cosmetics, it serves as a fast-evaporating solvent that provides a light, non-greasy feel, helps dissolve ingredients that won't mix with water, and acts as a natural preservative booster while improving the penetration of active ingredients into skin. Formulators choose it for its ability to create quick-drying, refreshing formulations in products like toners, sprays, and gel-based cosmetics, though its drying effect requires careful balancing with humectants in leave-on products.