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Colorant

HENNA

CAS 83-72-7 / 84988-66-9
45

Safety score · 0–100

Moderate

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

Henna powder — a traditional plant hair dye. Pure red henna is generally tolerated but lawsone has shown in-vitro genotoxicity, and so-called black henna is often spiked with allergenic PPD.

Function

BULKINGHAIR DYEINGSKIN CONDITIONING

Skin benefits

  • Natural hair colorant
  • Conditioning effect on hair fibre
  • Long traditional use

Known concerns

  • Lawsone is genotoxic in vitro
  • Black henna often adulterated with PPD
  • Sensitisation reports

References

EU

EU CosIng database

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

Related colorants

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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.