Science
Mechanism of Action
This ingredient functions by lowering the surface tension of cosmetic formulations, enabling it to act as an efficient cleansing agent that detaches impurities. As an emulsifier, it facilitates the stable combination of immiscible liquids like oil and water. Furthermore, its foaming properties allow it to entrap air or gas bubbles within a liquid, contributing to lather.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient demonstrates broad pH stability, performing effectively across alkaline and acidic ranges. However, hydrolysis typically occurs below a pH of 4, suggesting optimal performance in formulations maintained at or above this threshold.
Safety
Safety Profile
The CIR Expert Panel concluded that 'Sodium Cetearyl Sulfate and related alkyl sulfates' (including C16 and C18 chain lengths, relevant to this ingredient) are safe for use under current practices and concentrations. While no specific maximum concentration for SODIUM C16-20 ALKYL SULFATE has been explicitly defined in available research, related C16-C18 alkyl sulfates are considered only slightly irritating to the skin. It is important to note that these related compounds can cause serious eye damage. INCI Beauty assigns a 'Low penalty' across all categories for this ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A valuable surfactant for cleansing formulations, offering effective emulsification and foaming properties while maintaining a generally favorable safety profile for skin contact.
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