Science
Mechanism of Action
On the skin, it forms a protective film that minimizes moisture evaporation. Its allyl functional group facilitates copolymerization with vinyl acetate, enabling water-resistant films that adhere effectively to skin and other keratinous surfaces.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 When formulated as part of an Allyl Stearate/VA Copolymer, it contributes to film-forming and adhesion in waterproof products, typically at 0.5-5% of the copolymer.
- 02 Ex vivo models demonstrate its role as a stearic acid ester in boosting lipid levels and improving intercellular lipid lamellae length, supporting skin barrier repair.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Stable in anhydrous systems and oil-in-water emulsions. Uniform dispersion requires processing temperatures above its melting point (~30°C).
Synergies
- Vinyl Acetate (in copolymerization for water resistance)
Conflicts
- Strong oxidizing agents
- Strongly alkaline environments (potential for ester bond hydrolysis)
Safety
Safety Profile
The CIR Expert Panel affirms its safety for cosmetic use when formulated to be non-irritating, consistent with a low hazard score (1) on EWG Skin Deep.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A versatile emollient and film-former, Allyl Stearate enhances skin barrier function and boosts product longevity with a favorable safety profile.
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References
Sources