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Hair Dye

HYDROXYPROPYL BIS(N-HYDROXYETHYL-P-PHENYLENEDIAMINE) HCL

CAS 128729-28-2
30

Safety score · 0–100

Caution

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

A p-phenylenediamine-class oxidative hair-dye precursor. Strictly EU-restricted; the PPD family is a recognized skin sensitizer. Patch test essential.

Skin benefits

  • Permanent hair-dye precursor
  • Used in oxidative hair color

Known concerns

  • GHS H318 serious eye damage
  • H410 very toxic to aquatic life
  • p-Phenylenediamine class — known sensitizer
  • EU Annex III restricted

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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RESORCINOL
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Same plant / compound family

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Hydroxypropyl bis(N-hydroxyethyl-p-phenylenediamine) and its tetrahydro-chloride
Colorant

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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.