Science
Mechanism of Action
As a solvent, PEG-350 effectively dissolves active ingredients, fragrances, and colorants within formulations. Its humectant properties stem from its ability to form hydrogen bonds with water molecules, drawing moisture into the stratum corneum and reducing transepidermal water loss for sustained hydration. Furthermore, it acts as an emulsifier and surfactant, stabilizing oil and water phases, and functions as a binding agent to maintain product cohesion. Notably, PEG-350 can enhance the penetration of other active ingredients into the skin, amplifying their efficacy.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Polyethylene glycols (PEGs) generally serve as vehicles to enhance the delivery of active ingredients, with PEG-based salicylic acid peels demonstrating 75% efficacy and minimal irritation in treating comedogenic acne.
- 02 PEGs, constituting 20-30% of a topical base, have shown mild keratolytic effectiveness and moisture retention in treatments for ichthyosis, without significant systemic absorption or irritation.
- 03 PEG ointment has been observed to improve psoriasis-like inflammation through the down-regulation of inflammatory cells and factors.
Transparency
Dusting Analysis
Information regarding dusting behavior or thresholds for PEG-350 is not available in the provided data.
The Formula
Formulation
Stability
PEG-350 is characterized by its chemical inertness and robust stability across various formulations. Specific optimal pH ranges for its stability were not identified in the research data.
Conflicts
- May interact with starch-based thickeners, potentially causing a notable loss of viscosity. Xanthan gum-based thickeners are suggested as a compatible alternative.
- Potential for degradation, where degradation products could exhibit toxicity to mammalian cells.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed PEG-350's safety for cosmetic use, including on damaged skin. While generally possessing low toxicity and minimal irritation, the manufacturing process (ethoxylation) may generate trace amounts of 1,4-dioxane, a suspected carcinogen, though approved products must adhere to strict impurity limits. Hypersensitivity reactions, including urticaria and anaphylaxis, have been reported in individuals prone to allergies, with a potential for cross-sensitization among PEGs.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-350 is a valuable multi-functional ingredient, enhancing delivery, hydration, and formulation stability with a generally low risk profile, making it suitable for diverse skincare applications.
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