Isostearyl Alcohol
Reviewed by Emma · Last updated 18 Aug 2026
Also known as: Fatty Alcohol
Emollient— provides long-lasting moisture and softens skin | Viscosity control—helps improve product texture and flow
Addresses
EWG Safety Score
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What Is Isostearyl Alcohol?
Isostearyl alcohol is commonly used in lip care and other beauty products, where it offers a variety of beneficial properties and texture-enhancing functions, including the following:Emollient—softens and smooths via moisturization to skin.Viscosity control—helps adjust the thickness and flow of products.Spreading agent—allows for easy application of products.Solubilizer—helps ingredients mix evenly, typically in a water base.Unlike harsh forms of alcohol (such as denatured alcohol) that can be drying or irritating, this fatty alcohol is well-tolerated by skin.
Its ability to moisturize, improve product feel, and maintain stability makes it a valuable component in many formulations, contributing to both efficacy and sensory experience.In its raw material form, it is a colorless liquid with a stable composition, meaning it isn't prone to rancidity or change in color or odor over time. Isostearyl alcohol may be derived from plant or synthetic sources.
Beyond lip care, isostearyl alcohol can be found in various other beauty products, including moisturizers, serums, sunscreens, color cosmetics, self-tanners, and body lotions. It has been deemed safe by the Cosmetic Ingredient Review's safety assessment, with a maximum usage concentration reported up to 45%.
Clinical Evidence & References
Published Research
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Personal Care Products Council (INCIpedia), Accessed July 2024, ePublication []
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International Journal of Toxicology, 2008, pages 77–142 []
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Dermatologic Clinics, October 2000, pages 641-649 []
From the Clinic
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Isoparaffin
Saturated white wax derived from petroleum | Highly purified for use in cosmetics
Java Tea Extract
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Juglans Regia Seed
A finely textured physical exfoliant derived from walnut seed
Juglans Regia Shell Powder
A natural exfoliating powder derived from walnut shell fragments
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