Cetearyl Alcohol

What is Cetearyl Alcohol?

Cetearyl alcohol consists of cetyl and stearyl alcohols, long-chain saturated fatty alcohols typically derived from vegetable oils like coconut or palm, or produced synthetically. In cosmetics, it appears mainly in leave-on moisturizers, lotions, conditioners, and rinse-off cleansers. It works by forming a protective layer at oil-water interfaces to stabilize emulsions, preventing separation and enhancing product consistency. As a viscosity controller, it thickens formulas for better spreadability and feel. Its emollient properties allow it to soften skin surfaces, while opacifying effects create a creamy appearance. In surfactants, it aids foaming and cleansing without harshness, making it versatile across emulsions and wash products.

Comedogenic Rating 2/5 Moderate risk
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Emulsion stabilizer
Improves emulsion robustness by preventing droplet coalescence and phase separation, often by thickening, structuring, or strengthening the interfacial layer.
Opacifying agent
Makes a formula less transparent to create a creamy, opaque look; can also help visually mask suspended particles and improve aesthetic uniformity.
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Foam booster
Enhances foam volume and creaminess and can stabilize lather, improving sensory feel and perceived cleansing in shampoos and wash-off products.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.

Benefits

Stabilizes emulsions for long-lasting creamy textures in lotions and creams.

Softens skin by filling surface irregularities and aiding moisture retention.

Controls thickness to improve application ease and product stability.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with dry skin seeking richer, smoothing formulas.
Those with rare contact allergies to fatty alcohols.
Users preferring stable, non-separating moisturizers and conditioners.
Acne-prone skin if using high concentrations due to moderate comedogenic potential.
People wanting enhanced foam and cleansing in gentle wash products.
Individuals sensitive to plant-derived ingredients from coconut or palm sources.

Safety Notes

  • Considered low hazard with minimal irritation risk in typical use.
  • Extensively reviewed as safe for cosmetic applications by expert panels.

Frequently Asked Questions about Cetearyl Alcohol

What is cetearyl alcohol?

A mix of cetyl and stearyl fatty alcohols used to thicken, stabilize, and soften in creams, lotions, and cleansers.

Is it safe for sensitive skin?

Generally low irritation potential, suitable for most, though patch test if allergies suspected.

Does it cause breakouts?

Rated moderately comedogenic, so monitor in oil-rich formulas if acne-prone.