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UV Filter

UROCANIC ACID

CAS 104-98-3 Updated
52

Safety score · 0–100

Moderate

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

About

A natural skin metabolite once explored as a UV filter, but UV converts it into an immunosuppressive cis-isomer linked to skin cancer risk. EU restricts its use as a UV filter as a result.

Function

UV ABSORBER

Skin benefits

  • Endogenous to skin
  • Mild UV absorption
  • pH buffer

Known concerns

  • UV-driven cis-isomer is immunosuppressive
  • EU Annex II restriction
  • Photocarcinogenicity flags in animal models

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.