--- title: "Stearyl alcohol" description: "Stearyl alcohol is a waxy fatty alcohol used for emolliency, body and emulsion support. It differs from stearic acid and glyceryl stearate." --- # Stearyl alcohol > Stearyl alcohol is a waxy fatty alcohol used for emolliency, body and emulsion support. It differs from stearic acid and glyceryl stearate. Source: https://cosmetic-labs.com/glossary/stearyl-alcohol Created: 2026-11-10T10:19:42+00:00 Modified: 2026-11-10T10:19:42+00:00 Author: Emilie SCHOL ## Definition of Stearyl alcohol Stearyl alcohol is a waxy fatty alcohol consisting predominantly of octadecanol. It is used in cosmetics as an emollient, thickener and emulsion-support ingredient. It is not the same substance as [stearic acid](https://cosmetic-labs.com/glossary/stearic-acid) or the ester glyceryl stearate. ### Learn more ## What the name means Stearyl alcohol is a long-chain fatty alcohol. Commercial material consists predominantly of octadecanol, with smaller amounts of other fatty alcohols. It is a white, waxy solid rather than a description of every substance bearing the word alcohol. Ingredient identity matters here: the word alcohol names a chemical category, but the full ingredient name identifies the particular material being used in a cosmetic. ## Why it appears in creams and lotions Stearyl alcohol is used as an emollient, auxiliary [emulsifier](https://cosmetic-labs.com/glossary/emulsifier), bodying agent, thickener and emulsion stabilizer in creams and lotions. These roles can overlap in one formula. A developer may select it partly for the way it contributes to consistency, rather than for a stand-alone consumer benefit. Describing these formulation functions is more precise than treating the ingredient as proof that the entire product has a particular clinical effect. ## Skin feel and film formation Stearyl alcohol is hydrophobic and can form a semiocclusive film on the skin. Its use as an emollient and film-forming contribution are relevant to how a cream is designed. They do not, however, establish a fixed duration of moisturization for every formula containing it. The amount used and the finished composition remain separate questions. A raw-material role should not become a numerical hydration claim without evidence for the actual product. ## Physical properties and sourcing The material is supplied as a waxy solid. Manufacturing routes include processes starting with stearic acid, natural fats and oils, as well as synthetic routes. A generic ingredient name therefore does not provide a complete sourcing statement. Request documentation for the supplied grade when feedstock origin matters. Similarly, work from that grade’s physical specification rather than assuming all commercial materials have precisely the same composition. ## How it differs from related ingredients Stearyl alcohol is not stearic acid, which is a fatty acid, and it is not glyceryl stearate, an ester of glycerin and stearic acid. It is also not identical to cetearyl alcohol. Cetearyl alcohol is a mixture made mainly from cetyl and stearyl alcohols. These relationships help explain why the names often appear near one another in formulation discussions, but they do not make the ingredients automatically interchangeable. ## Interpreting tolerance and product claims Clinical testing of stearyl alcohol has generally indicated a low potential for irritation and sensitization under the studied conditions. Isolated cases of contact dermatitis have also been reported. A low potential in testing is not an allergy-free guarantee for a finished cream. Keep the product’s intended use, formulation and user tolerance in view. For a development brief, define whether the ingredient is needed for body, emolliency or emulsion support, and assess that outcome in the formula rather than relying on the ingredient name alone. Sources ## Sources and references References supporting this page are listed below. Source access dates and supported claims are recorded in the evidence notes where available. [Final Report on the Safety Assessment of Stearyl Alcohol, Oleyl Alcohol, and Octyl Dodecanol (1985)](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) URL [https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) [Final Report on the Safety Assessment of Stearyl Alcohol, Oleyl Alcohol, and Octyl Dodecanol (1985)](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) URL [https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) [Final Report on the Safety Assessment of Stearyl Alcohol, Oleyl Alcohol, and Octyl Dodecanol (1985)](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) URL [https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) [Final Report on the Safety Assessment of Stearyl Alcohol, Oleyl Alcohol, and Octyl Dodecanol (1985)](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) URL [https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) [Final Report on the Safety Assessment of Stearyl Alcohol, Oleyl Alcohol, and Octyl Dodecanol (1985)](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) URL [https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) [Safety Assessment of Monoglyceryl Monoesters as Used in Cosmetics, Final Amended Report (2016)](https://www.cir-safety.org/sites/default/files/glyest122015FAR.pdf) URL [https://www.cir-safety.org/sites/default/files/glyest122015FAR.pdf](https://www.cir-safety.org/sites/default/files/glyest122015FAR.pdf) [Safety Assessment of Fatty Acids & Fatty Acid Salts as Used in Cosmetics, Final Report (2019)](https://www.cir-safety.org/sites/default/files/facids042019finalrep.pdf) URL [https://www.cir-safety.org/sites/default/files/facids042019finalrep.pdf](https://www.cir-safety.org/sites/default/files/facids042019finalrep.pdf) [Final Report on the Safety Assessment of Cetearyl Alcohol, Cetyl Alcohol, Isostearyl Alcohol, Myristyl Alcohol, and Behenyl Alcohol](https://www.cir-safety.org/sites/default/files/115_buff3a_suppl.pdf) URL [https://www.cir-safety.org/sites/default/files/115_buff3a_suppl.pdf](https://www.cir-safety.org/sites/default/files/115_buff3a_suppl.pdf) [1985 fatty alcohol safety report, clinical summary](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) URL [https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf](https://www.cir-safety.org/sites/default/files/115_buff3b_suppl.pdf) --- ## Site identity - Organization: Cosmetic Labs - Description: Cosmetic Labs is a directory and a platform to meet all your cosmetic product development needs. From sourcing raw material to finding the best CRO for your needs. - Website: https://cosmetic-labs.com