Science
Mechanism of Action
Possessing both hydrophilic and lipophilic molecular segments, ISOSTEARETH-25 effectively reduces interfacial tension, allowing immiscible oil and water components to form stable emulsions. As a surfactant, it lowers the surface tension of liquids, facilitating the dispersion of impurities and aiding in their removal from the skin and hair surface.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
As a fundamental emulsifier and surfactant, ISOSTEARETH-25 is incorporated based on specific formulation requirements rather than for active claims, making it less susceptible to 'dusting' or arbitrary inclusion.
The Formula
Formulation
Stability
ISOSTEARETH-25 is sensitive to pH changes, demonstrating stability at low pH environments but undergoing hydrolysis at high pH levels.
Conflicts
- High pH environments
Safety
Safety Profile
The CIR Expert Panel determined related alkyl PEG ethers, including ISOSTEARETH-25, to be safe when formulated to prevent irritation. A critical consideration for all ethoxylated ingredients is the potential presence of residual carcinogenic compounds, ethylene oxide and 1,4-dioxane, underscoring the necessity for high ingredient purity. While a specific maximum concentration for ISOSTEARETH-25 is not explicitly detailed, similar emulsifiers like Ceteareth-25 are commonly used up to 30%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
ISOSTEARETH-25 is a valuable functional ingredient, essential for creating stable cosmetic emulsions and aiding in cleansing, provided it is sourced for high purity and formulated to be non-irritating.
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References
Sources