Science
Mechanism of Action
Operating exclusively on the skin's surface due to its substantial molecular weight (approximately 180,000 g/mol), PEG-180M functions primarily as a humectant, actively attracting and binding water molecules to the stratum corneum. This action significantly boosts skin hydration, leading to a smoother, more supple complexion. Beyond its direct skin benefits, it serves as a multi-functional excipient in cosmetic formulations: it controls viscosity to achieve optimal product consistency and spreadability, acts as a solvent to ensure even dispersion of oil-soluble ingredients in water-based systems, and stabilizes emulsions to extend product shelf life. In powdered applications, it also provides cohesive binding.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PEG-180M presents as an odorless white solid or waxy flakes, demonstrating high solubility in water but insolubility in oil. Its wax-like consistency allows for the creation of rich, creamy textures in liquid formulations. Polyethylene glycols inherently possess microbiological stability, a characteristic that can reduce the necessity for additional preservatives in the final product.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has unequivocally determined PEG-180M and other polyethylene glycols to be safe for use in cosmetic and personal care products. It is classified as minimally irritating and non-sensitizing, even addressing prior concerns by affirming its safety on both intact and compromised skin in a 2010 re-evaluation. While the ethoxylation process may generate trace amounts of 1,4-dioxane, stringent manufacturing purification steps effectively control its presence. European Union cosmetic regulations permit its use without restriction, aligning with its overall assessment as safe, non-toxic, non-irritating, and non-comedogenic at recommended concentrations.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-180M is a valuable multi-functional ingredient, primarily enhancing skin hydration and optimizing product formulations with a strong safety profile across all skin types.
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