Cetearyl Alcohol (Cetostearyl Alcohol) – Cosmetic Emulsifier & Thickener
Cetearyl Alcohol, also known as Cetostearyl Alcohol, is a fatty alcohol derived from vegetable sources that functions as a thickener, emulsifier, emulsion stabilizer, and co-emulsifier in cosmetic and personal care formulations. It is a blended mixture of Cetyl Alcohol (C16) and Stearyl Alcohol (C18), making it more versatile and stable than using either component alone.
Despite the word “alcohol,” Cetearyl Alcohol is not drying like ethanol or isopropyl alcohol. It is a waxy, conditioning fatty alcohol that enhances texture, improves viscosity, and provides a smooth, creamy skin feel in lotions, creams, conditioners, and balms.
This ingredient is widely used in professional formulations for:
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Lotions and body creams
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Hair conditioners and masks
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Emulsified scrubs
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Facial moisturizers
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Sunscreens
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Emulsified body butters
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Cream cleansers
Why Formulators Choose Cetearyl Alcohol
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Improves viscosity and product thickness
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Stabilizes oil-in-water emulsions
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Enhances creaminess and luxurious texture
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Provides a soft, non-greasy afterfeel
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Helps prevent separation in emulsified systems
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Compatible with most emulsifying waxes and surfactants
Cetearyl Alcohol works exceptionally well alongside emulsifying waxes, fatty acids, and conditioning agents to build structure and improve long-term stability. It is a foundational ingredient in many professional cosmetic formulations.
Technical Information
INCI Name: Cetearyl Alcohol
Chemical Composition: Mixture of Cetyl Alcohol (Hexadecanol) and Stearyl Alcohol (Octadecanol)
CAS Number: 67762-27-0
Appearance: White waxy flakes or pellets
Solubility: Oil soluble
Usage Rate: Typically 1% to 10% depending on formulation
Origin: Vegetable derived
How It Works in Formulations
Cetearyl Alcohol thickens by forming structured networks within emulsions. When heated and combined with oils and emulsifiers, it contributes to a stable, creamy texture. In hair care, it improves slip and conditioning, making it a key component in rinse-off conditioners and masks.
Because it is a blend of C16 and C18 fatty alcohols, it provides a balanced structure that enhances both stability and sensory feel.
