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HC YELLOW NO. 11

CAS 73388-54-2
42

Safety score · 0–100

Moderate

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

About

Hc Yellow No. 11 is a cosmetic ingredient used in product formulations. Note: subject to regulatory restrictions in some markets. Exercise caution due to limited available safety data.

HC Yellow No. 11 is an aromatic nitro compound used in oxidative hair dye systems, classified in CosIng Annex II under entry II/1236. This restriction indicates specific conditions apply — typically maximum concentration limits, required warning statements, and restrictions on use in certain product types (e.g., eye area prohibited). Hair dye substances in Annex II are permitted only for hair dyeing purposes and require coupon-based label warnings. The restriction reflects documented sensitization concerns for this class of aromatic amine dyes.

Known concerns

  • EU Annex II restricted (II/1236) — permitted only as hair dye at specific concentration limits
  • Documented skin sensitization potential in hair dye application
  • Not permitted in cosmetic products other than hair dyes
  • Requires specific warning labeling per EU hair dye regulations

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.