Cetearyl Alcohol

Cetearyl Alcohol, also known as cetyl-stearyl alcohol, cetostearyl alcohol, or C16-18 alcohol, is a white waxy fatty alcohol blend used to build texture, viscosity, opacity, and emulsion stability in cosmetic and personal-care formulas. Unlike short-chain drying alcohols such as ethanol, cetearyl alcohol is a long-chain fatty alcohol that contributes emollience, cushion, and a richer skin or hair feel. It is widely used in lotions, creams, conditioners, shampoos, mascara, lipstick, hair color products, and other emulsified or anhydrous systems.

CosIng lists Cetearyl Alcohol with functions including emulsion stabilising, opacifying, skin conditioning/emollient, cleansing surfactant, and emulsifying surfactant functions.

Key Benefits

Texture & Viscosity Builder

• Increases body, creaminess, and structure in lotions, creams, conditioners, balms, and sticks.
• Helps reduce thin or watery aesthetics in emulsions.

Emulsion Support

• Supports oil-in-water and water-in-oil emulsion stability when used with a complete emulsifier system.
• Helps improve resistance to separation and viscosity loss.

Emollient Skin & Hair Feel

• Adds a soft, waxy, conditioned after-feel without behaving like drying ethanol-type alcohols.
• Helps reduce drag and improve slip in creams, conditioners, and styling products.

Opacity & Foam Support

• Adds opacity and a denser visual appearance to creams, cleansers, shampoos, and conditioners.
• Can help stabilize or enhance foam structure in surfactant systems, depending on formula design.

Formulation Notes

• Typical use level: Commonly 0.5–5%; often 1–3% in emulsions. Higher levels may be used in sticks, balms, or very thick creams depending on desired structure.
• Phase: Oil phase.
• Solubility: Insoluble in water; soluble/dispersible in heated oil phase and compatible lipid systems.
• Melting point: 53,4°C
• Processing: Heat with the oil phase until fully melted before emulsification.
• Emulsion role: Best treated as a co-emulsifier, stabilizer, thickener, and sensory modifier, not as a complete standalone emulsifier for most systems.
• Appearance: White waxy solid pastilles.
• Aroma: Neutral.
• Compatibility: Works well with nonionic, anionic, and cationic systems, but final compatibility should be confirmed by stability testing.
• Hair care note: Useful in conditioners and masks for cushion, comb-through, and deposited fatty feel, especially with cationic conditioning agents.

From the Chemist

Jennifer says, “Use cetearyl alcohol when a formula needs more structure, cushion, and stability without making the product feel brittle or overly waxy. In emulsions, pair it with a true emulsifier system rather than relying on it alone. For lighter lotions, start low around 0.5–1.5%; for richer creams, conditioners, and masks, 2–4% can create a more substantial, creamy body.”

Applications

• Face creams and moisturizers
• Body lotions and body butters
• Hair conditioners and deep conditioning masks
• Shampoos and cream cleansers
• Mascara and color cosmetics
• Lipstick, balms, and anhydrous sticks
• Hair dyes and treatment creams
• Hand creams, foot creams, and barrier-style cosmetic products

The Science

Cetearyl alcohol is a mixture of saturated long-chain fatty alcohols, primarily cetyl alcohol and stearyl alcohol. These long hydrophobic chains help structure oil phases, improve lamellar or wax network formation in emulsions, and contribute to viscosity, opacity, and emollient skin feel. PubChem identifies cetearyl alcohol/cetostearyl alcohol under synonyms including C16-18 alcohols and CAS 67762-27-0.

CosmeticsInfo describes cetearyl alcohol and related fatty alcohols as ingredients used to help emulsions remain stable and to prevent separation in cosmetic products. The available support is strongest for formulation function and sensory performance rather than standalone clinical skin-treatment efficacy.

Claim Support

Potential cosmetic claims, subject to formula testing and documentation:

• Helps improve emulsion stability
• Adds body and viscosity
• Enhances creamy texture
• Provides emollient skin feel
• Helps soften and smooth the feel of skin and hair
• Adds opacity to cosmetic formulas
• Supports rich conditioner aesthetics
• Non-drying fatty alcohol
• Suitable for lotions, creams, conditioners, and color cosmetics
• RSPO-certified, Kosher, COSMOS, and Conventional certified, based on supplied certification information

Marketing Story

Cetearyl Alcohol is a classic formulator’s texture builder, delivering the creamy body, soft glide, and polished opacity customers expect from premium lotions, creams, conditioners, and balms. In white waxy pastille form with a neutral aroma, it blends seamlessly into heated oil phases to create elegant, stable, cushiony formulas with a smooth, conditioned finish.