CAS No: 36653-82-4 Formula: C16H34O M.W.242. Cetyl Alchohol has many functions in cosmetics and skincare products, including use as an emollient, emulsifier, thickener, and surfactant. As an emollient. It has the ability to soften and smooth flakiness on the skin which helps to reduce rough, dry skin. It is used as a moisturizer to treat or prevent dry, rough, scaly, itchy skin and minor skin irritations (e.g. diaper rash, burns from radiation therapy).