Science
Mechanism of Action
This ingredient operates primarily as a nonionic oil-in-water emulsifier. Its molecular structure, featuring both hydrophilic (PEG) and lipophilic (sesquilaurate) components, efficiently reduces interfacial tension between immiscible phases, enabling the formation of stable emulsions. Beyond its emulsifying capabilities, it acts as a mild surfactant, a gentle cleansing agent, an emollient providing a smooth skin feel, and can serve as a thickener by attracting water molecules. It also aids in clarifying oils within aqueous systems and stabilizing pigment suspensions in cosmetic products.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Suppliers typically recommend usage concentrations between 0.5% and 3.0%, varying with the specific application.
- 02 A concentration of 5.2% was utilized in an exfoliant scrub during a dermatologist-controlled clinical assessment.
- 03 The Cosmetic Ingredient Review (CIR) panel assumed a maximum use concentration of 1.0% for lipstick formulations.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient exhibits optimal stability within a pH range of 4.5 to 7.5, typically observed in a 1% aqueous solution. While possessing heat tolerance, it is advisable to maintain processing temperatures below 80°C to preserve its integrity. It contributes to high formulation stability and demonstrates good compatibility with electrolytes.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded in 2016 that PEG-20 Methyl Glucose Sesquilaurate is a safe cosmetic ingredient. This determination aligns with a broader 2013 CIR report that affirmed the safety of the methyl glucose polyethers and esters group. While suppliers recommend usage between 0.5% and 3.0%, CIR specifically noted an assumed maximum use concentration of 1.0% for lipstick products. Its mild profile indicates a low risk of sensitization.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This versatile, corn-derived emulsifier is valuable for creating stable, gentle, and cosmetically elegant formulations across all skin types, including sensitive skin, while offering multiple functional benefits.
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References
Sources