Cetylstearyl

Cetylstearyl refers to a technical mixture of long-chain fatty alcohols, primarily cetyl alcohol (C16) and stearyl alcohol (C18). It is produced and sold as a waxy, solid substance used in cosmetics and personal care products. The exact ratio of cetyl to stearyl alcohols can vary, but the material is typically used as a combined ingredient rather than as separate components.

In cosmetic formulations, cetylstearyl alcohol serves mainly as a rheology modifier, thickener, and emollient. It helps adjust viscosity and texture, providing slip and a creamy feel in creams, lotions, and ointments. It also acts as a stabilizing thickener in emulsions and can contribute to structure in solid products such as lip balms and bar soaps. As a fatty alcohol, it is generally insoluble in water and soluble in oils and organic solvents.

Production and composition are based on hydrogenation of higher fatty acids derived from natural fats and oils, yielding a technical mixture of cetyl and stearyl alcohols. Because of its chemical nature, cetylstearyl alcohol is considered relatively inert and compatible with many cosmetic ingredients.

Safety and regulation: cetylstearyl alcohol is widely used in cosmetics and is generally regarded as safe for topical use when used according to formulation guidelines. It may cause mild irritation for sensitive individuals at high concentrations, but it is not considered highly hazardous. It is commonly listed in ingredient databases and regulatory frameworks under related fatty alcohol names.

See also: cetyl alcohol; stearyl alcohol; fatty alcohols.