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Oxidative hair dye

3-HEXYLOXYCARBONYL-4,4'-DIAMINODIPHENYLAMINE HCL

CAS 2328127-51-9 (free base)
35

Safety score · 0–100

Caution

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

3-Hexyloxycarbonyl-4,4'-diaminodiphenylamine HCl is an oxidative hair dye precursor. Like related phenylenediamine dyes it can cause strong allergic contact dermatitis and is subject to strict EU concentration limits.

Skin benefits

  • Provides natural-looking dark color in oxidative hair dyes
  • Stable coupling component for permanent hair color systems

Known concerns

  • Class-typical strong skin sensitizer like related phenylenediamine dyes
  • Risk of allergic contact dermatitis on scalp, neck and eyelids
  • Requires SCCS evaluation and strict concentration limits in EU
  • Potentially cross-reactive with PPD allergies
  • Not suitable for use on eyebrows or eyelashes

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.