Science
Mechanism of Action
Functioning as an amphoteric surfactant, Sesamidopropyl Betaine primarily acts by lowering the surface tension of liquids, which allows for the efficient mixing of water with lipophilic substances like oils and dirt, enabling effective cleansing. Beyond its surfactant capabilities, it serves multiple roles, including boosting foam, neutralizing static charge, conditioning both hair and skin, and contributing to the viscosity control of formulations. Its mild nature makes it valuable for improving the detergency of cleansing products while significantly mitigating the potential for drying and irritation often associated with harsher primary surfactants.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient exhibits excellent water solubility across a broad pH range. For optimal formulation stability and enhanced skin compatibility, the recommended pH range for finished products is typically between 5.5 and 7.5.
Synergies
- Primary surfactants (improves overall detergency and mitigates potential drying or irritation, thereby enhancing formulation mildness)
Conflicts
- Cationic ingredients (may require careful pH adjustment during formulation to prevent potential incompatibility reactions)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined Sesamidopropyl Betaine to be safe for use in cosmetic applications, provided that formulations are crafted to be non-irritating and non-sensitizing. The potential for irritation or sensitization is often linked to residual impurities, specifically 3-dimethylaminopropylamine (DMAPA) and amidoamine, which should be rigorously controlled. While a specific maximum concentration for all applications is not provided as a single value, related amidopropyl betaines are generally considered safe at concentrations up to 6% in leave-on products and up to 30% in rinse-off products.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sesamidopropyl Betaine is a valuable amphoteric surfactant for diverse cosmetic formulations, offering effective yet mild cleansing, conditioning benefits, and foam enhancement, while contributing to overall product aesthetics and user comfort.
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References
Sources