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Colorant

Bisbenzimidazo[2,1-b:2',1'-i]benzo[lmn][3,8]phenanthroline-8,17-dione

CAS 4424-06-0 Updated
72

Safety score · 0–100

Fine

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

About

A vat-red perylene-type pigment (CI 71105). EU Annex IV permits this colorant in rinse-off cosmetics only. Inert insoluble pigment with strong lightfastness.

Skin benefits

  • Provides red colour in rinse-off
  • Lightfast and stable
  • Inert insoluble pigment

Known concerns

  • EU rinse-off restriction
  • Pigment dust — handle with care
  • Limited leave-on data

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