Science
Mechanism of Action
This ingredient functions by forming a lightweight, invisible film on the skin's surface. Its microspherical structure allows it to effectively fill fine lines and textural irregularities, resulting in a notably smoother skin canvas. Beyond its tactile benefits, it provides an optical blurring effect through light scattering, visually minimizing the appearance of pores and fine lines. This breathable barrier also aids in maintaining skin hydration without compromising pore integrity.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Poly(phenyl-methylsilsesquioxane) demonstrates robust stability when stored in sealed containers at temperatures below 30°C. As a molecular silica, it is inherently stable and is readily dispersible in low molecular weight silicones.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed the broader class of polysilsesquioxane ingredients, including closely related compounds like Polymethylsilsesquioxane, as safe for use in cosmetics under current practices and concentrations. These are large, insoluble molecules not expected to penetrate the skin, thereby mitigating concerns regarding systemic toxicity, dermal irritation, or sensitization. The maximum concentration reported for a related polysilsesquioxane was 55.2% in makeup preparations. No specific SCCS opinion or direct FDA approval status for METHYL/PHENYL POLYSILSESQUIOXANE was found in the provided research.
Your Skin
Skin Compatibility
Our Assessment
Verdict
METHYL/PHENYL POLYSILSESQUIOXANE is a valuable multi-functional ingredient, effectively improving skin texture, blurring imperfections, and forming a breathable moisture barrier, all while maintaining a strong safety profile suitable for all skin types.
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References
Sources