Science
Mechanism of Action
As a polymeric silicone, Polysilsesquioxane Steardimonium Chloride acts by forming a conditioning film on the skin. Its quaternary ammonium structure enhances skin affinity and adhesion, contributing to an improved barrier function and a firmer appearance. It functions as a light, non-greasy emollient, increasing the skin's capacity to bind moisture, resulting in a smooth, soft, and non-tacky touch. Additionally, its silicone nature helps reduce surface tension, promoting product spreadability without occluding pores.
Research
Clinical Evidence
Medium confidence0.25%
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient exhibits thermal stability as a solid powder. It remains stable in aqueous solutions, with the solid powder form (SiQube Q1850) being stable up to 5 weight percent, and a 3 weight percent aqueous solution (SiQube Q1851) also maintaining stability.
Conflicts
- Oxidizing agents
- High heat
- Excessive moisture
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined this ingredient is safe for use in cosmetics under current practices and concentrations. Acute oral toxicity studies indicate a low systemic risk (LD50 oral rat > 5000 mg/kg). While skin exposure is not anticipated to cause significant adverse health effects, direct contact with eyes may lead to irritation (classified as Serious eye irritation, Category 2/2B).
Your Skin
Skin Compatibility
Our Assessment
Verdict
This polymeric silicone is a valuable conditioning agent, enhancing skin feel, barrier function, and firmness without pore occlusion, and is affirmed as safe for cosmetic applications.
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References
Sources