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HC BROWN NO. 1

CAS 83803-98-9
44

Safety score · 0–100

Moderate

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

About

A hair dye compound restricted under EU Annex II/1298 with sensitization and potential genotoxicity concerns.

HC Brown No. 1 is an oxidative hair dye precursor listed in EU Annex II/1298, meaning its use in cosmetic hair dye products is restricted to designated uses with specific maximum concentration limits. Hair dye intermediates in the EU are subject to special assessment due to their potential to cause sensitization and, in some cases, genotoxicity. Mandatory warning labelling applies. The compound must not be used in eyelash or eyebrow tinting products.

Skin benefits

  • Hair dyeing

Known concerns

  • EU Annex II/1298 restricted
  • skin sensitizer
  • controlled use only

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.