Science
Mechanism of Action
Functioning as an occlusive agent, Hydroxypropyldimethicone forms a thin, hydrophobic protective layer on the stratum corneum. This barrier physically prevents moisture evaporation, contributing to sustained skin hydration, and shields the skin from external irritants. Furthermore, its emollient properties allow it to seamlessly fill microscopic surface irregularities, resulting in a noticeably smoother and more even skin texture. Due to its high molecular weight, its action is confined to the skin's surface, with negligible transdermal absorption.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient maintains stability within a functional pH range of 5.5 to 8.5. Its inherent inertness as a silicone polymer means it rarely reacts with other components, thereby contributing to the overall stability and integrity of cosmetic formulations.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Hydroxypropyldimethicone, like other dimethicone and methicone polymers, is safe for use in cosmetic formulations, particularly as a conditioning agent, at concentrations up to 15%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Hydroxypropyldimethicone is a valuable film-forming emollient and conditioning agent, enhancing skin hydration and texture with a strong safety profile and broad compatibility across skin types.
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References
Sources