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Moumoujus

PEG-15 STEARATE.

Valuable CAS 9004-99-3 / SURFACTANT - EMULSIFYING

PEG-15 Stearate is a versatile polyethylene glycol derivative of stearic acid, primarily functioning as an emulsifying agent and surfactant in skincare. Its unique molecular structure enables the stable blending of oil and water phases, while also contributing to improved skin moisture balance.

Summary

Surfactant Emulsifying agent Emollient Consistency enhancer Humectant Solubilizer Solvent Binding agent Softening agent Fixative

Science

Mechanism of Action

This ingredient operates by acting as an amphiphilic agent, possessing both lipophilic and hydrophilic segments. This characteristic allows it to significantly reduce the interfacial tension between otherwise immiscible oil and water components, thereby facilitating the formation and stabilization of emulsions. Additionally, PEGs are known for their hydrophilic nature, which can enhance the penetration of other active ingredients into the skin, and PEG fatty acid esters like PEG-15 Stearate can support the skin's natural moisture equilibrium.

Research

Clinical Evidence

High confidence
Effective range ≤25%
Optimal

N/A

Key findings

  1. 01 Clinical studies on intact skin demonstrated that PEG Stearates, including PEG-15 Stearate, did not act as irritants or sensitizers at concentrations up to 25%.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH N/A
0 7 14

Stability

PEG Stearates generally exhibit good stability, though their ether oxygens possess potential reactivity, and ester bonds are susceptible to enzymatic cleavage. They are well-tolerated by the skin and demonstrate resistance to microbiological degradation, potentially reducing the necessity for high preservative concentrations.

Safety

Safety Profile

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

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed PEG-15 Stearate's safety for use in cosmetics at current concentrations and practices. While clinical studies confirm no irritation or sensitization on intact skin at concentrations up to 25%, it is crucial to note that sensitization and nephrotoxicity have been observed in burn patients treated with PEG-based formulations. There is also a potential for cross-sensitization with structurally similar PEG derivatives. Industry practices include rigorous purification steps to minimize trace impurities like 1,4-dioxane.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

PEG-15 Stearate is a valuable multifunctional ingredient for formulation stability and skin conditioning, deemed safe for intact skin up to 25% concentration.

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