Science
Mechanism of Action
This copolymer primarily functions as a film-forming agent, creating a fine, breathable layer on the skin to provide a physical barrier. As a constituent containing polyethylene glycol (PEG), it also acts as a humectant, facilitating the retention of moisture by forming hydrogen bonds with water molecules, thereby reducing transepidermal water loss. This dual action supports long-term hydration, enhances skin protection, and improves the overall consistency and stability of formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
No specific data regarding dusting behavior or associated thresholds for STEARYL HDI/PEG-50 COPOLYMER were found in the available research.
The Formula
Formulation
Stability
STEARYL HDI/PEG-50 COPOLYMER exhibits broad solubility characteristics, compatible with both aqueous and oil-based formulations. While no specific optimal pH range for its stability has been identified, its polyethylene glycol (PEG) components are generally recognized for their stability across a wide pH spectrum and demonstrate good skin tolerance.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel, in their 2016 assessment of HDI polymers, noted that STEARYL HDI/PEG-50 COPOLYMER was not widely reported in current use, and consequently, insufficient data were available to make a definitive safety determination for this specific ingredient. While the panel concluded that significant residual isocyanate monomers are not expected in these ingredients, general PEG derivatives can be associated with contamination concerns from toxic impurities like ethylene oxide and 1,4-dioxane.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While STEARYL HDI/PEG-50 COPOLYMER demonstrates potential benefits as a film-forming humectant and barrier enhancer, its overall safety profile is currently undetermined due to a lack of comprehensive scientific data.
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