Science
Mechanism of Action
This water-soluble silicone functions primarily as an emollient, establishing a breathable protective film on the skin's surface. This film effectively minimizes transepidermal water loss, thus supporting sustained hydration. Beyond its moisturizing properties, it acts as a synthetic replenishing agent, improving skin smoothness, imparting a luxurious cushion, and enhancing texture and slip. It can also reduce the stickiness of other formulation components and visually diminish the appearance of fine lines.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Formulations containing PEG-8 PPG-8 Dimethicone are functionally stable within a pH range of 5.5 to 8.5. Hydrolysis is observed to be slower at a pH of 8 compared to a pH of 5, indicating improved stability in slightly alkaline conditions.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that similar dimethicone crosspolymer ingredients, including polyoxyalkylene siloxane copolymers, are safe for cosmetic use when formulated to be non-irritating. Specifically, PEG-8 dimethicone was assessed as safe at concentrations up to 5.6%. While generally considered non-toxic and non-comedogenic, PEG compounds may carry a risk of 1,4-dioxane contamination during manufacturing, a potential carcinogen. This concern can be mitigated through rigorous purification processes, though the Environmental Working Group (EWG) flags high contamination concerns for PEG-8 Dimethicone.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG-8 PPG-8 Dimethicone is a versatile water-soluble silicone that offers significant emollient, skin conditioning, and sensory enhancement benefits, suitable for a broad range of skin types with a low risk of irritation and comedogenicity, provided manufacturing standards ensure purity.
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