Science
Mechanism of Action
This ingredient functions as a surfactant, utilizing its hydrophobic component to bind to oily substances and impurities on the skin, while its hydrophilic part associates with water, facilitating their removal during cleansing. Additionally, its antimicrobial action helps regulate microorganism populations on the skin and protects the product itself from microbial spoilage as a preservative.
Research
Clinical Evidence
Medium confidenceFor leave-on facial creams, concentrations up to 0.5% (sum of C16 and C18 compounds) are considered safe and effective for their intended functions. As a preservative, it is authorized up to 0.1%.
Key findings
- 01 Evaluated as safe for non-preservative use at concentrations up to 0.5% (sum of C16 and C18 compounds) in leave-on facial creams, and up to 0.1% for preservative purposes. These limits imply efficacy within these bounds for the ingredient's stated roles.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
A 2% solution of a closely related compound, Cetrimonium Chloride, demonstrates stability across a broad pH range, specifically between pH 3 and 5.
Conflicts
- Anionic ingredients (due to its cationic nature)
- High concentrations of quaternary ammonium compounds can cause severe skin irritation.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined Cocotrimonium Chloride safe for use in cosmetics, subject to specific concentration and use limitations. It is authorized as a preservative at a maximum concentration of 0.1%. For non-preservative functions, the Scientific Committee on Consumer Safety (SCCS) considers a sum of C16 and C18 compounds safe up to 0.5% in leave-on facial creams, up to 1.0% in leave-on hair products, and up to 2.5% in rinse-off hair products. However, due to its classification as a quaternary ammonium compound, there is a moderate risk of irritant contact dermatitis, particularly when used at higher concentrations.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Cocotrimonium Chloride is a valuable ingredient for its combined cleansing, antimicrobial, and preservative properties, provided it is formulated carefully within recommended concentration limits to ensure optimal safety and minimize potential irritation, particularly for sensitive skin types.
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