Science
Mechanism of Action
This ingredient functions by bridging oil and water components due to its dual hydrophilic and lipophilic structure, thereby stabilizing emulsions. As a surfactant, it aids in cleansing by capturing oily impurities and allowing them to be rinsed away. On the skin, it provides a light conditioning effect, leaving the surface feeling soft and refreshed without greasiness.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyethylene glycols generally maintain stability across moderately strong acidic, alkaline, and saline conditions. However, prolonged exposure to temperatures above 50°C may induce oxidation. Manufacturers must prioritize minimizing impurities like ethylene oxide and 1,4-dioxane.
Synergies
- Hyaluronic Acid
- Glycerin
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed PEG-8 Diisostearate, along with similar PEG ingredients, safe for use in cosmetics under current market concentrations. While no specific maximum concentration is defined, 'safe as used' implies safety at typical application levels. Historically, related PEG/PPG compounds have been safely incorporated at concentrations up to 59.9% in certain products. It is crucial for manufacturers to ensure the minimization of common PEG impurities such as ethylene oxide and 1,4-dioxane.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-8 Diisostearate is a valuable multi-functional ingredient, widely utilized for its emulsifying, cleansing, and mild skin conditioning properties, suitable for all skin types with a low risk of irritation or comedogenicity.
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References
Sources