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Colorant

CI 20040

CAS 5979-28-2 Updated
35

Safety score · 0–100

Caution

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

About

CI 20040 — a disazo direct hair dye restricted in the EU to hair-only use because the azo backbone can release benzidine-related aromatic amines. Low-red reflects carcinogen-precursor concerns flagged by SCCS.

Skin benefits

  • Provides strong yellow coloration in EU-permitted hair dye use

Known concerns

  • Disazo dye restricted to hair dye use only under EU regulations
  • Potential to release benzidine-class aromatic amines
  • Sensitisation risk typical of direct azo hair dyes
  • Limited safety margin in SCCS evaluations

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.