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PEG-40 HYDROGENATED CASTOR OIL ISOSTEARATE.

Valuable / SURFACTANT - EMULSIFYING, VISCOSITY CONTROLLING

PEG-40 Hydrogenated Castor Oil Isostearate is a versatile nonionic surfactant that primarily functions as an emulsifier and solubilizer, enabling the stable incorporation of oils into aqueous cosmetic formulations. Beyond its functional roles, it acts as an emollient, contributing to enhanced skin hydration and a soft, smooth feel.

Summary

emulsifying solubilizing surfactant emollient viscosity controlling

Science

Mechanism of Action

This ingredient functions by reducing the surface tension between different phases, allowing the formation of stable oil-in-water emulsions. As a solubilizer, it effectively disperses essential oils, fragrances, and other lipophilic substances into water-based systems. On the skin, its emollient properties help to minimize transepidermal water loss, thereby improving skin moisture retention and overall softness. It further supports skin health by potentially strengthening the skin barrier through enhanced lipid stability between keratinocytes, and may offer anti-inflammatory and anti-itch benefits by moderating inflammatory mediators and reducing tissue edema.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

No information regarding dusting behavior for PEG-40 HYDROGENATED CASTOR OIL ISOSTEARATE was found in the provided research data.

The Formula

Formulation

Solubility
Both
Optimal pH 5.5 – 7
0 7 14

Stability

As a nonionic emulsifier, PEG-40 HYDROGENATED CASTOR OIL ISOSTEARATE exhibits high chemical stability across a broad pH range. Optimal stability is generally observed in formulations with a pH between 5.5 and 7.0. For effective incorporation, it is recommended to add this ingredient to the heated oil phase during the formulation process.

Safety

Safety Profile

CIR Status
Safe as used with restrictions
Max tested
100%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that PEG-40 Hydrogenated Castor Oil (a closely related compound) and the broader family of PEGylated oils, including analogues, are safe for use in cosmetics at concentrations up to 100%, provided they are formulated to be non-irritating. A primary safety consideration for PEG compounds involves potential contamination with ethylene oxide and 1,4-dioxane, which manufacturers typically control for.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG-40 HYDROGENATED CASTOR OIL ISOSTEARATE is a valuable functional ingredient due to its effective emulsifying, solubilizing, and emollient properties, with a low risk of irritation or comedogenicity across all skin types.

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