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Colorant

BASIC BROWN 4

CAS 4482-25-1 Updated
22

Safety score · 0–100

Caution

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

About

A dark-brown aromatic-amine hair dye (Bismarck Brown R class). PubChem flags H351 — suspected of causing cancer — so this lands in the red tier.

Function

HAIR DYEING

Skin benefits

  • Strong dark-brown hair-dye colour
  • Stable on hair fibre

Known concerns

  • GHS H351 suspected of causing cancer
  • Aromatic amine hair-dye class with sensitisation history
  • Limited cosmetic-specific safety review

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.