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Antimicrobial

POTASSIUM UNDECYLENATE

CAS 6159-41-7 Updated
60

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

Potassium salt of undecylenic acid — a fatty-acid antifungal also used as a mild preservative. Well-known dermatological agent with some skin and eye irritation potential at higher levels and aquatic toxicity flags.

Function

SURFACTANT - EMULSIFYINGPRESERVATIVESURFACTANT - CLEANSING

Skin benefits

  • Antifungal activity
  • Mild preservative booster
  • Used in foot and scalp treatments

Known concerns

  • Skin irritation at higher concentrations
  • Aquatic toxicity classification
  • Mild eye irritant
  • Limited cosmetic-specific monograph

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.