Science
Mechanism of Action
Functioning primarily as a solvent and a sophisticated delivery vehicle, PEG/PPG-200/70 Copolymer leverages its unique amphiphilic structure, comprising both hydrophilic polyethylene oxide and hydrophobic polypropylene oxide blocks. This dual nature allows it to solubilize poorly soluble ingredients, disperse pigments, and stabilize emulsions by integrating immiscible components. By enabling optimal ingredient dispersion and stability, it indirectly supports the efficient delivery and bioavailability of other active compounds on the skin.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
This ingredient functions as a formulation aid, such as a solvent or emulsifier, and is not typically used as a standalone active or in a form prone to 'dusting' in formulations.
The Formula
Formulation
Stability
Poloxamers are generally stable under standard conditions, though they exhibit 'reverse solubility,' becoming more soluble at lower temperatures. Increased temperature can lead to reduced solubility of the polypropylene oxide block and micelle formation. This copolymer's structure can be influenced by pH, indicating potential pH sensitivity.
Conflicts
- Strong oxidizing agents are incompatible with Poloxamers.
- Formulators must ensure rigorous purification to control impurities such as ethylene oxide, propylene oxide, and 1,4-dioxane to established safe limits.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has assessed Poloxamers, including this type, concluding they are not dermal irritants or sensitizers in animal models, with clinical tests showing uniformly negative results for human skin irritation and sensitization. Little skin penetration is predicted due to molecular weight and solubility. While reproductive and developmental toxicity data were not available, the FDA has approved Poloxamers for use in pharmaceuticals, foods, and cosmetics, emphasizing the critical importance of purification to minimize impurities like ethylene oxide, propylene oxide, and 1,4-dioxane.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PEG/PPG-200/70 Copolymer is a valuable formulation aid, enabling superior stability and efficient delivery of active ingredients by seamlessly blending immiscible components across all skin types.
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