Science
Mechanism of Action
As an amphiphilic silicone polymer, PPG-27 Dimethicone effectively reduces interfacial tension, thereby enabling the stable emulsification of otherwise incompatible oil and water phases in cosmetic products. On the skin, it forms a lightweight, vapor-permeable film. This protective layer helps to minimize transepidermal water loss (TEWL), thereby improving skin hydration and bolstering its defense against external irritants. Furthermore, its solvent properties aid in solubilizing various active ingredients, perfume oils, and colorants. In certain applications, it can also temporarily fill fine lines, contributing to a plumper skin appearance.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
PPG-27 Dimethicone, as an amphiphilic silicone polymer, contains both water-soluble (PPG) and silicone-soluble groups. Its stability and specific properties are highly influenced by the ratio and molecular weight of these groups. For related PEG-Dimethicones, stable formulations are typically achieved within a pH range of 5.5 to 8.5. Formulators can adjust the D/D* ratio (the ratio of water-soluble to silicone-soluble groups) to optimize solubility, prevent separation in aqueous systems, and create microemulsions for enhanced ingredient deposition.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Dimethicone and related substituted-methicone polymers, including alkoxylated derivatives like PEG/PPG-27/27 Dimethicone, are safe for use in cosmetic products. This assessment is based on their large molecular weights, which significantly reduce the likelihood of skin absorption. While a specific maximum concentration for PPG-27 Dimethicone was not detailed, Dimethicone itself has been reported safe for dermal contact products up to 85%. Additionally, the FDA permits Dimethicone as an active ingredient in over-the-counter skin protectant drug products at concentrations of 1-30%. Independent evaluations by organizations such as EWG indicate low concern for cancer, allergies & immunotoxicity, and developmental/reproductive toxicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PPG-27 Dimethicone is a valuable ingredient for enhancing formulation stability, skin hydration, and sensory feel, with a strong safety profile.
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