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POLYGLYCERYL-5 TRISTEARATE.

Valuable CAS 9009-32-9 (Generic) / SURFACTANT - EMULSIFYING

Polyglyceryl-5 Tristearate is a versatile polyglyceryl fatty acid ester that acts as an emollient, emulsifier, and surfactant. It supports skin barrier health by reducing moisture loss and improving skin texture, while also ensuring the stability and consistency of cosmetic formulations.

Summary

emollient emulsifying surfactant thickening agent

Science

Mechanism of Action

On the skin, Polyglyceryl-5 Tristearate functions as an emollient, creating a protective, non-occlusive barrier that significantly reduces transepidermal water loss and defends against environmental stressors. This action helps to smooth the skin by filling microscopic intercellular gaps, resulting in enhanced hydration, softness, and resilience. As an emulsifier, it is critical for stabilizing complex mixtures of oil and water-based ingredients, ensuring product homogeneity and improving spreadability. Its surfactant properties enable it to gently lower surface tension, effectively aiding in the removal of impurities and excess oil from the skin without harshness. Additionally, it contributes mild thickening to formulations.

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

Polyglyceryl-5 Tristearate exhibits high stability against oxidation and demonstrates excellent compatibility with a broad spectrum of cosmetic ingredients, which is crucial for achieving stable, homogeneous formulations. While highly robust, pH conditions can influence certain functional properties, such as foam volume, indicating pH should be a consideration during product development to optimize stability and performance.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has assessed Polyglyceryl-5 Tristearate, alongside 273 other polyglyceryl fatty acid esters, concluding its safety for use in cosmetics when formulated to be non-irritating under current practices and concentrations. Regulatory bodies, including the European Cosmetics Regulation, also recognize the safety of similar polyglyceryl esters, recommending adherence to established concentration limits. Further supporting its safety, polyglycerol fatty acid esters (E475) are approved as food additives in many countries, and a related compound, Polyglyceryl-5 Stearate, is listed by EWG Skin Deep with low concerns for various toxicities.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Polyglyceryl-5 Tristearate is a valuable multi-functional ingredient, enhancing skin hydration and barrier function while significantly improving product stability and texture across diverse cosmetic formulations.

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