Antimicrobial
Undec-10-enoic acid and its salts
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Undecylenic acid and its salts — an antifungal fatty acid restricted in EU cosmetics to a maximum of 0.2% (as acid), with placement restrictions at 0.1% and a ban as an aerosol propellant.
Skin benefits
- Antifungal action against dermatophytes
- Used historically in athlete's-foot products
Known concerns
- EU restricted to max 0.2% as acid
- Cannot be used as aerosol propellant
- Potential skin irritation at higher levels
- Restricted placement at concentrations greater than or equal to 0.1%
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related antimicrobials
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.