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Antioxidant

3,4-DIHYDROXYBENZOIC ACID

CAS 99-50-3
70

Safety score · 0–100

Fine

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

Protocatechuic acid — a plant-derived polyphenol antioxidant. Useful for free-radical scavenging in formulas; PubChem flags routine raw-material irritation, manageable at cosmetic levels.

Function

SKIN PROTECTING

Skin benefits

  • Strong polyphenol antioxidant
  • Studied for anti-inflammatory effects
  • Found naturally in many plants
  • Photoprotective potential

Known concerns

  • GHS H315 skin irritation
  • H319 serious eye irritation
  • H335 respiratory irritation
  • Niche cosmetic use, modest dossier

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, so always read the physical product label and consult a healthcare professional for personal concerns.