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Colorant

ACID RED 18

CAS 2611-82-7 Updated
35

Safety score · 0–100

Caution

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

About

A monoazo hair dye colorant (Ponceau 4R / E124). Approved in EU under Annex IV with strict purity and use restrictions, but the broader azo-dye class has documented allergen and aromatic-amine concerns.

Function

HAIR DYEING

Skin benefits

  • Provides intense red coloration
  • Approved as food colorant E124 in some regions
  • Used in rinse-off hair colorants

Known concerns

  • Azo dye that can release aromatic amines
  • Documented allergenic potential
  • EU Annex IV listing with strict purity and use restrictions
  • Banned in food in several countries

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.