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Antioxidant

PROTOCATECHUICALDEHYDE

CAS 139-85-5
68

Safety score · 0–100

Fine

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

A plant phenolic aldehyde with antioxidant and brightening research interest. Aldehydes can be mild sensitisers — limited cosmetic safety data.

Function

ANTIOXIDANTBLEACHINGSKIN CONDITIONING

Skin benefits

  • Antioxidant
  • Tyrosinase inhibition (brightening)
  • Studied in plant phenolics

Known concerns

  • Aldehyde reactivity — potential sensitiser
  • Limited cosmetic-specific safety review
  • May discolor on oxidation

References

EU

EU CosIng database

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

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Antioxidant

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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.