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HC RED NO. 3

CAS 2871-01-4
45

Safety score · 0–100

Moderate

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

About

Hc Red No. 3 is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.

HC Red No. 3 is a nitrophenylazo-derived hair dye intermediate producing red tones in oxidative and semi-permanent hair colour systems. Azo dyes with nitro substituents on the aromatic ring — particularly nitro-PPD derivatives — are known to carry skin sensitisation risk and have been subject to extensive EU SCCS review. This compound has been individually listed in EU Annex III of Regulation 1223/2009, which sets a specific maximum concentration limit for its use in hair dye products, reflecting the cumulative safety assessment data for this colorant.

Known concerns

  • Skin sensitisation potential (nitro-azo class)
  • Azo dye metabolic activation concern
  • Listed in EU Annex III with specific concentration limit

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.