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Hair dye precursor (restricted/banned isomers)

Diaminophenols (1)

18

Safety score · 0–100

Avoid

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

A family of dye-forming aromatic amines used in permanent hair colour. The umbrella entry is banned in EU cosmetics, and only narrowly defined isomers are allowed under strict Annex III limits in salon use.

Skin benefits

  • Historically used as oxidative hair dye intermediates that develop colour with peroxide
  • No skin-care benefit

Known concerns

  • Listed under EU Cosmetics Regulation Annex II as prohibited substances in their unrestricted form
  • Diaminophenol isomers are strong skin and respiratory sensitisers
  • Some isomers raise genotoxicity and carcinogenicity concerns flagged by SCCS opinions
  • Hair-dye exposure is permitted only for specific isomers under strict Annex III limits

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.