Science
Mechanism of Action
This ingredient functions primarily as an occlusive emollient, forming a protective film on the skin's surface to minimize moisture evaporation. By filling microscopic voids within the epidermal layer, it reinforces the skin's natural barrier against external factors, leading to improved hydration, softness, and elasticity. Additionally, it serves as a non-aqueous viscosity-increasing agent and can act as a binder or wetting agent for pigments and UV filters.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Pentaerythrityl Stearate is characterized as a white, hard wax with a high melting point, demonstrating excellent thermal stability and minimal volatility, with decomposition initiating around 400°C. No specific optimal pH range for stability has been identified.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of Pentaerythrityl Tetrastearate and related pentaerythrityl tetraester compounds for cosmetic use, concluding they are nonirritating and non-sensitizing. While no specific maximum concentration was noted for Pentaerythrityl Stearate, a related ingredient, PEG-150 Pentaerythrityl Tetrastearate, was deemed safe at concentrations up to 5% in hair dyes and 1.8% in other hair grooming aids. It is also recognized by the FDA as an indirect food additive. No SCCS assessment was found.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Pentaerythrityl Stearate is a safe and effective occlusive emollient, valuable for enhancing skin hydration and barrier function, particularly beneficial for dry and sensitive skin types.
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References
Sources