Science
Mechanism of Action
This ingredient forms a delicate occlusive barrier on the skin's surface, effectively reducing transepidermal water loss and thereby delivering an indirect moisturizing benefit. Beyond hydration, it acts as a lubricating agent, significantly improving product spreadability and glide. In formulations, it enhances user comfort, diminishes tackiness, especially in color cosmetics, and serves as a viscosity modifier, adding body to anhydrous systems while facilitating uniform pigment dispersion.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Isostearyl Hydroxystearate exhibits general stability under standard cosmetic formulation conditions. It is miscible with a wide array of oils and esters, and it can be effectively dispersed in ethanol. Optimal performance in formulations is contingent on precise oil-phase design, rigorous control over sensorial and thermal stability, and consistent quality control measures for parameters such as acid value, impurities, and odor stability.
Safety
Safety Profile
The CIR Expert Panel has concluded that alkyl esters, including Isostearyl Hydroxystearate, are safe for use in cosmetic applications when formulated to be non-irritating. The highest reported typical use concentration in existing formulations is 15.0% in lip products. While cosmetic ingredients do not mandate FDA pre-market approval, manufacturers are legally responsible for product safety. This ingredient is recognized by the FDA Global Substance Registration System.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Isostearyl Hydroxystearate is a valuable emollient and skin-conditioning agent, enhancing skin texture and delivering indirect hydration with a low risk of irritation or comedogenicity, making it suitable for a broad range of skin types and product applications.
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References
Sources