Science
Mechanism of Action
This ingredient operates by undergoing hydrolysis to produce silica. The resulting silica then aggregates to form a durable film, which in cosmetic terms, manifests as a protective barrier on the skin. This film provides properties such as durability and protection against external factors.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Ethyl Polysilicate exhibits limited solubility in water, reacting slowly to form silica gel. Its essential hydrolysis reaction, which facilitates its film-forming capability, is catalyzed by both acids and bases. Optimal stability of the hydrolysate is achieved when the pH is precisely maintained between 1.5 and 2.5. Conversely, a pH range of 5 to 6 leads to significant instability, and alkaline catalysis can induce rapid gelification. It is readily soluble in organic solvents such as ethanol, benzene, ether, and acetone, but is highly sensitive to moisture.
Conflicts
- strong oxidizing agents
- water
- alkalies
- mineral acids
- moisture
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that silicate ingredients, including this class, are safe for cosmetic use when formulated to be non-irritating and used within current practices and concentrations. However, data were insufficient to assess the safety of naturally-sourced (mined) silicate ingredients in products with potential incidental inhalation. Undiluted Ethyl Polysilicate itself can cause irritation to the eyes, respiratory system, and skin, necessitating careful handling and precise formulation to mitigate these risks.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While Ethyl Polysilicate demonstrates a clear mechanism for film formation, comprehensive clinical data on its specific cosmetic efficacy and optimal usage for precision skincare are currently insufficient to provide a definitive assessment.
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