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Colorant

5-AMINO-4-FLUORO-2-METHYLPHENOL SULFATE

CAS 163183-01-5
35

Safety score · 0–100

Caution

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

A specialty oxidative hair-dye coupler — used at low levels in permanent hair colour. Like other aromatic-amine dyes, it can sensitise skin and is regulated by EU as an Annex III hair-dye ingredient.

Function

HAIR DYEING

Skin benefits

  • Oxidative hair-dye coupler
  • Provides specific shade range
  • Used at low % in hair colour

Known concerns

  • Aromatic amine hair dye — potential skin sensitiser
  • Phenylenediamine-class allergen risk
  • Restricted under EU hair-dye Annex III
  • Avoid on damaged scalp

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, so always read the physical product label and consult a healthcare professional for personal concerns.