Stearyl Alcohol

Benefits

Softening

What is Stearyl Alcohol?

Stearyl alcohol is a saturated, long-chain fatty alcohol with 18 carbon atoms, typically derived from vegetable oils like palm or coconut through hydrogenation of stearic acid, or produced synthetically. In cosmetics, it belongs to the emollient and surfactant categories, commonly found in lotions, creams, shampoos, and conditioners. It functions by forming a protective layer on the skin to reduce water loss, enhancing product spreadability and texture. As an emulsifying agent, it bridges oil and water phases for stable mixtures. Its thickening properties adjust viscosity for smooth application, while opacifying effects create a creamy appearance. In cleansers, it boosts foam and refatting action to prevent stripping. Overall, it improves sensory qualities without penetrating deeply, making it versatile for daily skincare.

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.

Fragrance ingredient

Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).

Surfactant

Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.

Emulsifying agent

Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.

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.

Masking

Reduces perception of unpleasant odors or tastes by neutralizing them or covering them with more acceptable sensory notes.

Opacifying agent

Makes a formula less transparent to create a creamy, opaque look; can also help visually mask suspended particles and improve aesthetic uniformity.

Refatting

Replenishes lipids removed during cleansing to improve mildness and reduce tightness, leaving skin or hair feeling less stripped after rinse-off use.

Benefits

Softens and smooths skin surface for better feel.

Supports dry skin by aiding moisture retention.

Enhances product stability and texture for even application.

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 hydration.	Those with very oily or acne-prone skin.
Users preferring rich, creamy formulations.	Individuals sensitive to fatty alcohols.
People wanting mild cleansing without tightness.	Users avoiding thicker emollients.

Safety Notes

Rated low hazard by EWG with scores of 1.
Deemed safe for cosmetic use by expert reviews.

Frequently Asked Questions about Stearyl Alcohol

What is stearyl alcohol?

A long-chain fatty alcohol used as an emollient, emulsifier, and thickener in creams and lotions.

Is stearyl alcohol safe for skin?

Yes, it has low hazard ratings and is safe as used in cosmetics per expert assessments.

Does it clog pores?

It has a moderate comedogenic rating of 2, so use cautiously on acne-prone skin.