Science
Mechanism of Action
This compound exerts its preservative action by interfering with microbial cell membranes, effectively inhibiting the growth of bacteria and fungi within cosmetic products. As a surfactant, it reduces the interfacial tension between immiscible liquids, promoting the uniform dispersion of ingredients necessary for stable emulsion formation.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
Information regarding 'dusting' or ingredient prevalence above safety thresholds is not available in the provided research data.
The Formula
Formulation
Stability
No specific optimal pH range for the stability of Steartrimonium Bromide was identified in the research data.
Conflicts
- When formulating with multiple quaternary ammonium derivatives, their combined irritative potential should be carefully evaluated to ensure product safety.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined Steartrimonium Bromide to be safe for use in rinse-off products and for leave-on applications at concentrations up to 0.25%. For its specific function as a preservative, the European Union Cosmetics Regulation sets a stricter maximum concentration of 0.1% for related alkyl trimethyl ammonium compounds. While concentrated forms can be irritating, use at authorized low levels in cosmetic formulations is generally not associated with significant skin or eye irritation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Steartrimonium Bromide is a valuable ingredient, primarily ensuring product integrity through its preservative action and contributing to formulation stability as a surfactant, all within established safety limits.
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