Science
Mechanism of Action
PEG-6 acts primarily as a humectant by forming hydrogen bonds with water molecules, drawing moisture from the atmosphere and delivering it gradually to the skin for prolonged hydration, simultaneously minimizing water evaporation. It serves as a solvent and carrier, improving the solubility and absorption of other active compounds by forming reversible complexes. Additionally, PEG-6 functions as an emulsifier, blending immiscible oil and water phases, and its inherent surfactant properties facilitate uniform product application and absorption. It also contributes emollient benefits to soften the skin and is recognized for its ability to enhance ingredient penetration.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
A 10% aqueous solution of PEG-6 maintains stability within a pH range of 4.6 to 7.4, demonstrating good resistance to alkaline conditions.
Synergies
- Enhances the solubility and absorption of other active ingredients.
Conflicts
- Avoid application on broken or severely damaged skin, as PEG-6 can increase the penetration of potentially toxic substances and may cause irritation.
- The interaction of PEG-6 with specific active substances requires individual testing, as complex formation can sometimes inactivate the active ingredient (e.g., Penicillin G, Bacitracin).
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed PEG ingredients, including PEG-6, as safe for use in cosmetic products, citing low oral and dermal toxicity. Lower molecular weight PEGs are minimally absorbed, with absorption through intact skin considered negligible for higher molecular weight variants. PEG-6 is classified as minimally irritating and not a sensitizer to human skin. Systemic toxicity concerns have only been observed when applied to severely damaged skin (e.g., second and third-degree burns), not healthy intact skin. Manufacturers are advised to control for potential 1,4-dioxane contamination, a carcinogenic byproduct, through purification. PEG-6 is approved by the U.S. FDA for indirect food contact.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-6 is a valuable multi-functional ingredient, widely appreciated for its humectant, solvent, and emulsifying properties, demonstrating a strong safety profile for use on intact skin within well-formulated products.
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