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BASIC YELLOW 11

CAS 4208-80-4
38

Safety score · 0–100

Caution

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

About

A cationic anthraquinone-type dye used in semi-permanent hair colourants, subject to EU Annex II restriction (II/1273) with sensitization potential.

Basic Yellow 11 is an anthraquinone-derived cationic dye that imparts yellow tones in oxidative and semi-permanent hair dye formulations. It is listed in EU Annex II/1273, prohibiting its use in cosmetic products due to concerns around sensitisation potential and insufficient safety data. Its PubChem safety score of 42 reflects moderate toxicity concerns, and it requires declaration in the ingredient list under INCI rules when present as a hair dye component.

Known concerns

  • EU Annex II restricted (II/1273) - prohibited in cosmetic products
  • Potential skin sensitiser
  • Insufficient REACH safety data

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.