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PEG-23 STEARATE.

Valuable CAS 9004-99-3 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

PEG-23 Stearate is a polyethylene glycol derivative primarily valued for its surfactant and emulsifying properties, which are crucial for creating stable and homogenous cosmetic formulations. It contributes to product consistency and can offer emollient and humectant benefits, supporting skin hydration and texture. Studies indicate a low potential for skin irritation or sensitization at typical usage concentrations.

Summary

Emulsifier Cleansing Agent Surfactant Emollient Humectant Consistency Enhancer Penetration Enhancer

Science

Mechanism of Action

Operating as a potent surfactant and emulsifying agent, PEG-23 Stearate effectively reduces the interfacial tension between oil and water phases, enabling the stable dispersion of immiscible liquids within a formulation. This action is essential for the integrity of emulsions. Beyond its foundational role in formulation, it functions as a cleansing agent and can impart emollient and humectant qualities to the skin. Moreover, it may act as a vehicle, potentially enhancing the penetration of other ingredients into the skin, particularly when the skin barrier is compromised.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

Polyethylene glycols, including PEG-23 Stearate, exhibit versatile solubility characteristics, effectively bridging water-soluble and oil-soluble components. Its water solubility and hygroscopicity generally diminish as the molar mass of the polyethylene glycol chain increases.

Synergies

  • Potentially enhances the penetration of other active ingredients, especially on compromised skin.

Safety

Safety Profile

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

The Expert Panel for Cosmetic Ingredient Safety (CIR) concluded that PEG Stearates, including PEG-23 Stearate, are safe for use in cosmetics at current concentrations. Clinical studies demonstrated no evidence of irritation or sensitization at concentrations up to 25%. While high concentrations (100% in animal studies) showed slight skin and minimal ocular irritation, these levels are significantly above typical cosmetic application. It's noted that PEGs, as a class, may increase the penetration of other ingredients, which is a consideration for individuals with a highly compromised or exceptionally sensitive skin barrier.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-23 Stearate is a valuable ingredient, primarily serving to create stable and effective formulations in a wide range of skincare and cosmetic products, exhibiting a low risk of irritation at relevant concentrations.

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