Science
Mechanism of Action
This polymer enhances formulation stability by acting as a binding agent and controlling viscosity, while also improving emulsion consistency. On the skin, it functions as an emollient and lubricant, contributing to skin conditioning. Like other polyethylene glycols, PEG-115M can form hydrogen bonds with water molecules, thereby attracting and retaining moisture on the skin to reduce water evaporation and benefit dry conditions.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyethylene glycols generally exhibit good stability. However, aging of solutions may lead to a decrease in pH and increased levels of aldehydes, carboxylates, and peroxides. Optimal stability can be achieved by storing solutions at low temperatures (-20°C to 4°C), purged of oxygen, and protected from light.
Safety
Safety Profile
The CIR Expert Panel concluded that PEG-115M is safe for use in cosmetic and personal care products. As a higher molecular weight PEG (above PEG-75), it is minimally absorbed through intact skin, minimally irritating, and is not identified as a sensitizer, mutagen, or carcinogen. While kidney toxicity concerns arose from PEG-based antimicrobial cream use on severely burned patients, no systemic toxicity was observed in studies involving intact skin. The potential presence of 1,4-dioxane, a by-product of ethoxylation, is a known concern that can be controlled through purification.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-115M is a valuable and safe multi-functional polymer, providing essential formulation support and mild hydrating properties suitable for all skin types.
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References
Sources