Cetearyl Alcohol and Ceteareth 18 are INCI names, i.e. International Nomenclature of Cosmetic Ingredients, of two chemical ingredients classified as emulsifiers. In terms of chemical structure, they are a mixture of cetearyl alcohol and ethoxylated cetearyl alcohol, also known as 18TE. Such a designation indicates that cetearyl alcohol was formed as a result of ethoxylation by eighteen moles of ethylene oxide. The product, which is a mixture of these two substances, is not classified according to Regulation (EC) No 1272/2008 [CLP/GHS] and is therefore not considered to pose a risk to human health or the environment. It is completely biodegradable, which means that it breaks down into simple substances – organic and inorganic compounds that occur in the natural environment and do not pose a threat to it.

Properties and application

Cetearyl Alcohol and Ceteareth 18 as a mixture are very effective emulsifiers, forming O/W emulsions, i.e. oil in water. Thanks to this, they are widely used in the composition of skin care cosmetics, for example in hair conditioners and shampoos, as well as in skin cleansing and care products. The mixture is highly stable in solutions with a wide range of pH values, which means it can also be used in products with specific pH values that differ from neutral. Such products include depilatory creams and pastes, as well as body and face scrubs. A mixture of Cetearyl Alcohol and Ceteareth 18 is essentially a non-ionic surfactant which, when used with anionic surfactants, mitigates their drying effect. It forms a protective occlusive film, preventing excessive drying and leaving the treated area feeling pleasantly moisturised and soft. In addition, the mixture is an excellent rheology modifier and foam stabiliser.

These properties make it suitable for use in improving the consistency and form of the prepared product by ensuring the right viscosity and lubricity, as well as supporting foaming processes. These are extremely important properties when selecting ingredients for formulas used in a wide range of cosmetic products, including lotions, creams, conditioners, shampoos, body and face washes, and bath liquids. The use of each ingredient individually or in combination does not cause allergic reactions, making it suitable for use in cosmetics for sensitive and allergic skin.