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HC BLUE NO. 9

CAS 114087-41-1 / 114087-42-2
58

Safety score · 0–100

Moderate

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

About

Hc Blue No. 9 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 Blue No. 9 (CAS 114087-41-1) is an oxidative hair dye precursor restricted under EU Cosmetics Regulation 1223/2009 Annex III Part II with entry II/1327. It may only be used at a maximum concentration of 0.05% in the ready-for-use preparation and must carry specific caution statements. The dye is also restricted after mixing with hydrogen peroxide to a maximum of 0.05%. Repeated exposure may cause allergic reactions in susceptible individuals.

Skin benefits

  • Provides blue color to hair
  • Used in oxidative hair dye formulations

Known concerns

  • EU Annex III restricted - limited to 0.05% in ready-for-use preparations
  • Potential skin sensitization
  • May cause allergic reactions with repeated exposure

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.