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PEG-25 GLYCERYL STEARATE.

Valuable CAS - / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PEG-25 Glyceryl Stearate is a versatile ethoxylated fatty acid ester primarily functioning as an emulsifier and surfactant, crucial for stabilizing complex skincare formulations. It also acts as a solubilizer and viscosity modifier, while offering emollient and humectant properties to support skin hydration and texture.

Summary

emulsifying surfactant solubilizer viscosity modifier humectant emollient

Science

Mechanism of Action

Operating as an effective emulsifier, PEG-25 Glyceryl Stearate reduces the interfacial tension between immiscible liquids like oil and water, ensuring the stability and consistency of cosmetic emulsions. Its surfactant properties facilitate uniform ingredient blending. Beyond its foundational role in formulation, it functions as a solubilizer to integrate challenging ingredients, and as a viscosity modifier to enhance product texture and spreadability. Furthermore, its polyethylene glycol component can attract and retain moisture, contributing to humectant benefits, and impart a smoother feel to the skin as an emollient.

Research

Clinical Evidence

High confidence
Effective range 2–25%
Optimal

N/A

Key findings

  1. 01 Clinical evaluations of PEG Stearates, including PEG-25 Stearate, demonstrated no irritant or sensitizing effects when used at concentrations up to 25%.
  2. 02 A related compound, PEG-25 Propylene Glycol Stearate, was classified as nonallergenic in guinea pig sensitization tests at challenges of 25-50% in petrolatum.
  3. 03 An antiperspirant formulation containing 2% PEG-25 Propylene Glycol Stearate was shown to be practically non-irritating to the skin in human patch tests and non-irritating to mildly irritating to rabbit eyes.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 7.5
0 7 14

Stability

PEG-25 Glyceryl Stearate exhibits robust stability against heat, acids, and bases, which is vital for maintaining product integrity and preventing phase separation. The pH of a 1% aqueous solution typically ranges between 5.0 and 7.5.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
25%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has determined PEG Stearates, including PEG-25 Glyceryl Stearate, to be safe for use in cosmetics under current practices and concentrations up to 25%. The previous caution against using PEGs on compromised skin was lifted in 2010. While there is a potential for 1,4-dioxane contamination during its manufacturing process (ethoxylation), reputable manufacturers implement measures to minimize these levels, and regulatory limits are typically in place. Individuals with particularly sensitive skin are advised to conduct a patch test prior to broad application.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

PEG-25 Glyceryl Stearate is a valuable ingredient for its robust emulsifying and stabilizing properties, contributing to product elegance and skin hydration with a low risk of irritation or sensitization.

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