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PEG-15 HYDROGENATED CASTOR OIL TRIISOSTEARATE.

Valuable / SURFACTANT - EMULSIFYING, VISCOSITY CONTROLLING

PEG-15 Hydrogenated Castor Oil Triisostearate is a versatile non-ionic ingredient derived from castor oil, primarily functioning as an effective emulsifier and surfactant. It expertly blends immiscible substances like oil and water, ensuring stable and aesthetically pleasing product formulations. Beyond stabilization, it also acts as a powerful solubilizer for various active ingredients, fragrances, and colorants.

Summary

emulsifying surfactant solubilizer viscosity controlling emollient humectant

Science

Mechanism of Action

This ingredient operates as an amphiphilic molecule, possessing both oil-attracting (lipophilic) and water-attracting (hydrophilic) components. This dual nature enables it to significantly reduce the interfacial tension between oil and water phases, leading to the formation of stable emulsions. It supports uniform dispersion of various compounds within a formula and contributes to product consistency by controlling viscosity. Additionally, related PEGylated castor oils are known to create a protective barrier on the skin, which helps reduce moisture loss, and attract water from the environment to enhance skin hydration and barrier function.

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 5.5 – 7
0 7 14

Stability

As a non-ionic emulsifier, PEG-15 Hydrogenated Castor Oil Triisostearate maintains its activity across a broad pH range, specifically between 5.5 and 7.0, encompassing both acidic and alkaline conditions. Its inherent resistance to oxidation and chemical degradation further enhances product stability, contributing to an extended shelf life and consistent texture, scent, and overall efficacy.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has deemed 130 related PEGylated oils, including hydrogenated castor oil derivatives, safe for cosmetic use when properly formulated to be non-irritating. While safety for related PEG-30 and PEG-40 Hydrogenated Castor Oil has been established at concentrations up to 100%, specific maximum concentration for PEG-15 Hydrogenated Castor Oil Triisostearate is not noted. Small, controlled amounts of 1,4-dioxane, a processing by-product of ethoxylation, may be present but are mitigated through purification processes. Some sources suggest a potential for irritation with this specific ingredient, with risk increasing when combined with other challenging ingredients. Furthermore, PEG-35 Castor Oil, a related compound, has been linked to potentially increasing the sensitization potential of other ingredients.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Medium
Comedogenicity Medium

Our Assessment

Verdict

Valuable

This versatile PEGylated castor oil derivative is a valuable formulating agent due to its strong emulsifying, solubilizing, and stabilizing properties, making it an essential component for achieving stable and well-dispersed cosmetic formulations across a range of skin types, though its potential for medium irritancy and comedogenicity should be considered during formulation.

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