The ingredient, explained

Stearyl Alcohol

Stearyl Alcohol has published research relevant to cosmetic safety assessment.

EmollientEmulsifyingEmulsion stabilisingFoam boostingMaskingOpacifyingRefattingViscosity controllingSurfactant

Ingredient guide

What it is and what it does

Stearyl alcohol is a long-chain fatty alcohol. Its recorded functions include softening the skin surface, helping oil and water phases mix and adjusting formula thickness.

About this ingredient: CosIng identity and functions via Open Beauty Facts ↗ · European Commission ingredient function definitions ↗ · PubChem: Cetearyl alcohol ↗

Emollient: Helps soften and smooth the skin surface.
Emulsifying: Helps liquids that do not normally mix form a mixture.
Emulsion stabilising: Helps keep an emulsion from separating.
Foam boosting: Changes the amount, texture or stability of foam.
Masking: Reduces or conceals the formula's underlying odour or taste.
Opacifying: Makes a product less transparent.
Refatting: Replenishes lipids on hair or the outer skin layers.
Viscosity controlling: Adjusts how thick or fluid a product is.
Surfactant: Changes surface tension to help a product distribute or interact with other materials.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Safety assessment

The report reviews animal toxicology, irritation, clinical patch testing and formulation photoreactivity for the listed fatty alcohols.

What this does not tell us

Historical group safety evidence with supporting formulation tests. It does not establish a skin benefit or guarantee tolerance in every product.

Sources for this summary. DOI 10.3109/10915818509078685 ↗

Research review checked Oct 1, 2026

Selective exact-identity review of 0 supplied local candidates and the targeted primary-source search recorded below. Bounded review, not a systematic search.