Alcohol Denat (denatured alcohol). It is often used in cosmetic and personal care products for various purposes. Denaturing involves adding substances to the alcohol to make it taste bad or smell unpleasant, preventing people from drinking it. In cosmetics, Alcohol Denat is commonly used for its evaporative properties. It evaporates quickly, providing a cooling sensation on the skin and helping to disperse the product. It is also used as a solvent for other ingredients and can aid in the absorption of products into the skin.