Science
Mechanism of Action
This ingredient operates by significantly reducing interfacial tension, thereby facilitating the stable blending of oil and water phases as an emulsifier. As a surfactant, it lowers the surface tension of cosmetic products, promoting even distribution during use and aiding in the solubilization of other ingredients. Its cleansing action stems from its ability to enable water to mix with and lift oil and dirt from skin and hair, allowing for easy rinsing.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Poloxamer 105 is water-soluble and can form thermoreversible gels, which means they transition between liquid and gel states with temperature fluctuations. It exhibits reverse solubility, becoming less soluble as temperature rises. Elevated temperatures and/or concentrations can lead to microphase separation, micelle formation, and eventually clouding or macroscopic phase separation due to the dehydration of its polyoxypropylene blocks.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded Poloxamer 105, along with other Poloxamers, to be safe for use in cosmetic products at concentrations up to 20%. While identified as a minimal ocular irritant, it is not considered a dermal irritant or sensitizer. Due to its molecular weight and solubility profile, skin penetration is anticipated to be minimal. Adherence to rigorous purification procedures is crucial to ensure levels of impurities, such as 1,4-dioxane, ethylene oxide, and propylene oxide, remain below established thresholds.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Poloxamer 105 is a valuable functional ingredient, serving as an effective emulsifier and surfactant with a good safety profile and low risk of dermal irritation for all skin types.
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