Science
Mechanism of Action
As an alkoxylated derivative of dimethicone, this ingredient acts primarily as a surfactant and emulsifier, enabling the stable incorporation of oil and water components within a formulation. It also provides conditioning properties to the skin, improves product spreadability, and functions as a wetting agent and plasticizer, contributing to optimal product texture and application.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Alkoxy polysiloxanes containing a PEG moiety are typically hydrophilic, exhibiting solubility in both water and various alcohols. An increase in the number of alkoxy groups generally correlates with enhanced water solubility.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Panel determined PEG/PPG-25/25 Dimethicone to be safe for use up to 0.33% in leave-on products. Dermal studies on rabbit skin at 100% concentration showed no irritation. However, it demonstrated slight ocular irritation in rabbits, with all signs resolving within 72 hours. Manufacturers are advised to ensure that potential impurities, such as cyclotetrasiloxane (<1%), cyclopentasiloxane (<0.5%), volatile organic compounds (<2%), ethylene oxide, and 1,4-dioxane, are maintained at safe levels.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG/PPG-25/25 Dimethicone is a versatile silicone copolyol widely valued for its emulsifying, emollient, and conditioning properties, suitable for all skin types within its recommended concentration limits.
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References
Sources