Science
Mechanism of Action
This ingredient primarily functions by reducing the surface tension between different phases within a formula, acting as an emulsifier to stabilize oil-in-water or water-in-oil systems. As a solubilizer, it enables the uniform dispersion of oil-soluble compounds, such as fragrances or active ingredients, into water-based solutions. On the skin, its surfactant properties aid in lifting and removing impurities, while also contributing to the skin’s natural moisture retention, providing a subtle emollient effect. Additionally, it helps to control the viscosity of cosmetic preparations, influencing their texture and spreadability.
Research
Clinical Evidence
High confidence1%
Transparency
Dusting Analysis
PEG-60 Hydrogenated Castor Oil Triisostearate is a foundational formulation ingredient, not typically marketed as an active with overhyped claims. Its value lies in its functional properties within a product's composition.
The Formula
Formulation
Stability
This ingredient exhibits excellent stability, particularly around a neutral pH, and is highly effective in preventing phase separation in emulsions, thereby maintaining product consistency over time. It notably enhances clear solubility in water-based systems and is well-suited for formulations with low alcohol content.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has assessed PEG Castor Oil derivatives, including this ingredient, as safe for use in cosmetic formulations. Related PEG Hydrogenated Castor Oil ingredients have been deemed safe at significantly higher concentrations (up to 100%). While the ethoxylation process can yield trace amounts of 1,4-dioxane, this impurity is a recognized byproduct that can be effectively managed through purification steps, ensuring consumer safety. The FDA also lists castor oil as a permitted flavoring agent in food, and PEG Castor Oil ingredients are approved for indirect food additive uses.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This highly functional ingredient is valuable for its critical role in stabilizing diverse cosmetic formulations, ensuring ingredient compatibility, and providing mild cleansing and moisturizing benefits with a low risk of irritation or comedogenicity across all skin types.
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