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Hair dye precursor

N,N-DIETHYL-P-PHENYLENEDIAMINE SULFATE

CAS 6283-63-2
12

Safety score · 0–100

Avoid

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

A p-phenylenediamine-class oxidative hair dye intermediate. Strongly tied to allergic contact dermatitis and tightly restricted by EU cosmetics regulation due to sensitization risk in scalp applications.

Skin benefits

  • Historically used as an oxidative hair dye precursor
  • Provides dark color development when paired with couplers

Known concerns

  • Strong skin sensitizer in the p-phenylenediamine family
  • Restricted or banned in many EU hair dye applications without strict limits
  • Known to trigger severe contact dermatitis and cross-reactivity with PPD allergy
  • Potential systemic toxicity if absorbed in significant quantity

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.