Cetyl alcohol provides cosmetics products with consistency and serves as an emulsifier. Cetyl alcohol is a fatty alcohol that is well tolerated while having smoothing and non-oily components in emulsions and hair care products. It can also improve the absorption factor of emulsions.
see Heike Käser 2010, "Naturkosmetische Rohstoffe", Linz, Verlag Freya, 3. Edition 2012