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POLYGLYCERYL-4 ISOSTEARATE.

Valuable CAS - / SURFACTANT - EMULSIFYING

Polyglyceryl-4 Isostearate is a highly versatile ingredient functioning as a primary emulsifier and surfactant to enhance formula stability and facilitate skin cleansing. It additionally imparts beneficial skin conditioning properties, contributing to a smoother and more hydrated feel.

Summary

Cleansing Agent Surfactant Emulsifying Emulsion Stabilising Skin Conditioning

Science

Mechanism of Action

This ingredient operates as a highly effective surfactant by reducing surface tension between disparate phases, leveraging its unique molecular structure with both hydrophilic and lipophilic segments. This dual affinity enables it to encapsulate and lift impurities from the skin, allowing for their effortless removal with water. Concurrently, as a primary emulsifier, it plays a critical role in stabilizing oil-water mixtures within cosmetic products, preventing phase separation and ensuring consistent product integrity. Furthermore, it contributes to skin's overall well-being by acting as a conditioning agent, supporting moisture retention and a smoother skin feel.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Both
Optimal pH 5 – 6
0 7 14

Stability

Polyglyceryl-4 Isostearate exhibits robust stability, effectively emulsifying over a broad pH spectrum. Its inclusion significantly enhances the longevity and stability of cosmetic products by preventing undesirable phase separation and preserving the formula's integrity throughout its shelf life and use. As a member of the polyglyceryl fatty acid esters group, it is considered inherently inert and stable.

Conflicts

  • May not be suitable for fungal acne-prone skin due to its derivation from isostearic acid.
  • Demonstrates reduced tolerance to electrolytes (e.g., sodium chloride, magnesium sulfate) unless co-formulated with auxiliary emulsifiers like Polyglyceryl-3 Diisostearate.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed polyglyceryl fatty acid esters, including Polyglyceryl-4 Isostearate, safe for cosmetic use under current practices, provided formulations are non-irritating. It demonstrates low general toxicity and is typically well-tolerated. For individuals with predisposed sensitivities, patch testing is advised. It is recognized within the FDA Global Substance Registration System (GSRS).

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A valuable ingredient, Polyglyceryl-4 Isostearate efficiently stabilizes diverse cosmetic formulations and supports skin cleansing, all while offering beneficial conditioning properties.

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