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1-(4-(Phenylazo)phenylazo)-2-naphthol

CAS 85-86-9
22

Safety score · 0–100

Caution

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

About

An azo dye historically used as a colourant, now restricted in the EU due to concerns about azo bond cleavage and potential carcinogenic amine formation.

This compound is an azo dye subject to EU restriction under Annex III, which prohibits its use in products applied on mucous membranes. Its azo bond structure raises concerns under EU REACH regulations, as certain azo dyes can cleave to release carcinogenic aromatic amines. It carries H341 (mutagenicity) and H351 (carcinogenicity suspect) hazard classifications.

Known concerns

  • Suspected mutagen (H341)
  • Suspected carcinogen (H351)
  • Azo dye - potential amine cleavage concern
  • EU Annex III restricted for mucous membrane products

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