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Antioxidant

1,2,4-TRIHYDROXYBENZENE

CAS 533-73-3
12

Safety score · 0–100

Avoid

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

A reactive phenolic compound (hydroxyhydroquinone) used in skin lightening research. Classed as a skin sensitizer with toxicity flags, and falls under EU hydroquinone-class restrictions.

Function

HAIR DYEING

Skin benefits

  • Inhibits tyrosinase in lab studies
  • Antioxidant activity in vitro

Known concerns

  • Known skin sensitizer
  • Possible genotoxicity
  • Acute oral toxicity
  • EU hydroquinone-class restrictions
  • Risk of paradoxical hyperpigmentation

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.