Science
Mechanism of Action
As the sodium salt of undecylenic acid, this ingredient primarily exerts its action by disrupting the integrity of microbial cell membranes. It integrates into the lipid bilayers, thereby increasing permeability, which leads to the leakage of intracellular components and ultimately cell death. It exhibits antifungal activity against organisms like Candida species and possesses antibacterial properties. Preliminary indications also suggest potential anti-inflammatory effects through the modulation of inflammatory cytokines.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Optimal performance and stability are achieved within a pH range of 8.0 to 11.0, though a 1% solution typically presents a pH between 6.5-8.5 or 8-10. It remains stable under standard storage conditions in cool, dry environments. This compound also serves as an effective emulsifying agent, aiding in the homogeneous blending of oil and water phases, and demonstrates compatibility across various cosmetic systems. Formulators are advised to utilize the lowest effective concentration to ensure optimum shelf life and safe application.
Safety
Safety Profile
The CIR Expert Panel has concluded that Sodium Undecylenate is safe in current cosmetic uses and concentrations, provided it is formulated to be non-irritating and non-sensitizing. While some aggregated GHS information (40% of reports) indicates potential for mild skin irritation (H315) and serious eye irritation (H319), a majority (60% of reports) state it does not meet GHS hazard criteria. It is generally described as a mild skin irritant. No specific SCCS opinion was identified in the provided research data. The FDA Global Substance Registration System lists this compound.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Undecylenate is a highly valuable, broad-spectrum antimicrobial and preservative, offering reliable performance, formulation versatility, and good skin compatibility with a low irritancy profile.
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References
Sources