Alcohol Denat
Alcohol Denat. is ethanol denatured in accordance with customs and excise regulations, meaning it contains additives that make it undrinkable and poisonous. It is a super common yet debated skincare ingredient used widely across cosmetics, toners, sunscreens, and after-shaves. It functions as a solvent, penetration enhancer, astringent, antimicrobial agent, viscosity controller, and can also act as a preservative in natural formulations.
Alcohol Denat. is an effective solvent for ingredients that do not dissolve in water or oil, and it helps create cosmetically elegant, fast-absorbing, lightweight formulas. It acts as a strong astringent, leaving a refreshing sensation on skin, and has antimicrobial properties useful for disinfecting skin in acne-prone or after-shave products.
Can be very drying, especially when listed among the first few ingredients; long-term use may lead to the skin overcompensating with excess oil production. Some experts (e.g., Paula Begoun) argue that regular exposure damages the skin barrier and causes inflammation, though this is debated. Dr. Leslie Baumann recommends avoiding it if it appears in the first 7 positions on an ingredient list. The concern is specifically with simple, volatile, low molecular weight alcohols.
