Science
Mechanism of Action
As a non-ionic surfactant, PEG-2 Stearate effectively reduces surface tension, enabling the formation of stable oil-in-water emulsions, thereby preventing phase separation in cosmetic formulations. Beyond its emulsifying role, it acts as an opacifying agent, decreasing product transparency and creating a uniform, cloudy appearance. Structurally, it is an ester of stearic acid and diethylene glycol; this composition allows it to contribute mild emollient effects, while its polyethylene glycol backbone generally offers good skin tolerance, potentially enhancing consistency and providing humectant properties within the formula.
Research
Clinical Evidence
Low confidence25%
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This versatile non-ionic surfactant is recognized for enhancing emulsion stability and texture. To maintain its integrity, prolonged exposure to temperatures exceeding 32°C (90°F) should be avoided.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has consistently affirmed PEG-2 Stearate as safe for use in cosmetics at current concentrations, with reaffirmations in 2005 and 2024. It is also recognized as an FDA-listed ingredient. While concerns regarding potential contamination with Ethylene Oxide and 1,4-Dioxane from its manufacturing process have been raised, the CIR's safety assessment accounts for current usage conditions.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-2 Stearate is a valuable ingredient for stabilizing emulsions, enhancing product appearance through opacification, and improving texture, with a strong safety profile established by regulatory bodies.
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References
Sources