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Moumoujus

PEG-7 STEARATE.

Valuable CAS 9004-99-3 / SURFACTANT - EMULSIFYING

PEG-7 Stearate is a polyoxyethylene ester derived from stearic acid, primarily utilized as a surfactant and emulsifier. It is crucial for stabilizing oil-in-water emulsions in cosmetic formulations and contributes to skin hydration through its hygroscopic properties.

Summary

emulsifying surfactant humectant

Science

Mechanism of Action

PEG-7 Stearate functions by reducing the interfacial tension between immiscible liquid phases, allowing for the creation and stabilization of homogenous oil-in-water emulsions, which is vital for product consistency and texture. Beyond its emulsifying role, it possesses hygroscopic characteristics, enabling it to attract and retain moisture on the skin's surface, thereby enhancing hydration. The overall efficacy of this ingredient can often be modulated by synergistic interactions with other components within a formulation.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–10%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

PEG-7 Stearate exhibits low water solubility but dissolves effectively in organic compounds such as alcohols and hydrocarbons. It is essential for forming and maintaining the stability of oil-in-water emulsions, thereby achieving desired creamy textures. This compound decomposes permanently at temperatures exceeding 200 °C.

Synergies

  • Enhances emulsion stability and product texture in conjunction with other formulation components.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
10%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that PEG-7 Stearate is safe for use in cosmetics at concentrations up to 10%, a finding reaffirmed in 2005 with consideration for reopening in 2024. While generally safe for healthy skin, a general caution for all PEGs suggests avoidance on severely damaged skin due to historical observations of sensitization and nephrotoxicity in burn patients using PEG-based antimicrobial preparations. The FDA UNII record for PEG-7 Stearate (VCX261B12R) is currently noted as 'FAILED' due to an 'incomplete polymer record'.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-7 Stearate is a valuable ingredient, effectively stabilizing emulsions and contributing to skin hydration with a low risk of irritation or sensitization, making it suitable for a wide range of cosmetic formulations for healthy skin.

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