Science
Mechanism of Action
This ingredient operates primarily by reducing the interfacial tension between immiscible oil and water phases, thereby creating stable emulsions. Functioning as a surfactant, it enables effective cleansing and dispersion of substances. Its derivative nature from Polyethylene Glycol (PEG) means it also acts as a humectant, drawing moisture to the skin, and a solubilizer for ingredients that are not readily water-soluble, while also preventing formula dry-out. On the skin, it provides a lubricating effect for a smoother application and finish.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyethylene glycols (PEGs) and polypropylene glycols (PPGs), which are integral to this ingredient, exhibit a broad spectrum of viscosity and solubility characteristics. PEGs are known for their ready miscibility with water, indicating good aqueous stability.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed PPG-2/PEG-8 Cocoate, along with related PEG Propylene Glycol Esters/Derivatives, safe for use in cosmetics. An initial assessment set a maximum concentration of 10%, which was reaffirmed in a 2016 re-review. This re-review also removed prior cautions regarding its use on damaged skin. Manufacturers are mandated to ensure that impurities, including residual ethylene oxide (max. 1 ppm), 1,4-dioxane (max. 10 ppm), polycyclic aromatic compounds (max. 1 ppm), and heavy metals (max. 10 ppm combined), do not exceed specified limits.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PPG-2/PEG-8 Cocoate is a valuable ingredient for formulation stability and skin conditioning, offering emulsifying, surfactant, and humectant properties with a low irritancy profile and broad skin compatibility, deemed safe for use up to 10% concentration.
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