Science
Mechanism of Action
This ingredient operates by forming a lightweight film on the skin's surface, contributing to a smooth and conditioned feel. Its unique surfactant-like molecular structure, possessing both hydrophobic and hydrophilic elements, enables it to efficiently combine immiscible liquids like oils and water, thereby creating stable emulsions in cosmetic formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PPG-28 Cetyl Ether is synthesized via the alkoxylation of cetyl alcohol with propylene oxide. Its inherent surfactant properties, characterized by distinct hydrophobic and hydrophilic ends, contribute to its stability and ability to emulsify, making it soluble in both oil and water phases.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed PPG-28 Cetyl Ether, among other alkyl PEG/PPG ethers, safe for use at current practices and concentrations, provided formulations are non-irritating. For leave-on products, typical concentrations are 5% or less. Larger molecular structures such as this are less likely to penetrate the skin significantly. Manufacturers must ensure purification processes minimize potential impurities like residual ethylene oxide, propylene oxide, and 1,4-dioxane. While propylene glycol, a component of PPGs, has shown irritation at concentrations as low as 2-10% in specific tests or on compromised skin, the broader class of PPGs (≥3) is generally considered safe for cosmetic use up to 50% when properly formulated to be non-irritating.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PPG-28 Cetyl Ether is a valuable ingredient, particularly beneficial for dry skin, effectively conditioning and stabilizing formulations within its recommended usage limit of 5%.
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