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Colorant

CI 20470

CAS 1064-48-8 Updated
35

Safety score · 0–100

Caution

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

About

Acid Black 1 (CI 20470) — an azo dye used as a hair colorant. EU-restricted to oxidative hair dye use; documented sensitizer and not permitted near eyes. Use cautiously.

Function

COLORANT

Skin benefits

  • Provides black/dark hair color
  • Approved at restricted concentrations in EU hair dyes

Known concerns

  • Azo dye — potential aromatic amine release of concern
  • Skin sensitizer in patch testing
  • EU restricted; not for use near eyes or eyebrows
  • Hair dye allergen risk

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.