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Hair Conditioning

N-BENZYL-4-METHYL-O-PHENYLENEDIAMINE

CAS 39235-93-3
18

Safety score · 0–100

Avoid

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

An oxidative hair-dye intermediate in the phenylenediamine family. Like its relatives (PPD, toluenediamine), it is a strong sensitizer and tightly restricted in EU cosmetics.

Function

SKIN CONDITIONING

Skin benefits

  • Oxidative hair-color coupler/primary intermediate

Known concerns

  • Aromatic phenylenediamine — strong skin sensitizer class
  • SCCS-restricted oxidative hair-dye precursor
  • Patch testing recommended before each use
  • Not for eyebrow/eyelash dyeing

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.