Science
Mechanism of Action
This ingredient functions as a surfactant and emulsifying agent, effectively reducing interfacial tension to enable the stable combination of typically immiscible oil and water phases within cosmetic formulations. Beyond its role in stability, it acts as a skin conditioning agent, enhancing the skin's texture and smoothness. It also supports skin hydration by assisting in moisture retention, and in cleansing applications, it aids in lifting impurities and dirt.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PEG-4 Polyglyceryl-2 Stearate is a non-ionic emulsifier, ideally suited as a co-emulsifier for crafting creamy oil-in-water (O/W) emulsions. For optimal stability, especially at elevated temperatures, it often requires integration with a co-surfactant exhibiting a lower HLB value and a co-emulsifier with a melting point significantly above ambient room temperature. Its ability to form a liquid crystalline gel network is crucial for enhancing emulsion stability and increasing product viscosity. It is generally dispersible in water and soluble in oils.
Synergies
- Co-surfactants with lower HLB values (for enhanced emulsion stability)
- Co-emulsifiers with high melting points (for stability at elevated temperatures)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed PEG Stearates, including this ingredient, safe for use in cosmetics under current practices and concentrations, up to 25%. Clinical studies indicate that at concentrations up to 25%, it is neither an irritant nor a sensitizer. However, when tested at 100% in experimental animals, some PEG Stearates showed low-level skin and minimal eye irritation. The ingredient is recognized as safe for specific food uses by the FDA and listed favorably by EWG. A key concern involves potential contamination with toxic manufacturing impurities like ethylene oxide and 1,4-dioxane.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A safe and versatile non-ionic emulsifier that also contributes to skin hydration and texture, making it a valuable component in various skincare formulations.
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