Hair Dye
p- Phenylene-diamine and its salts
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
PPD — the workhorse permanent hair-dye intermediate. EU caps it at 2% in hair dye with a sensitisation warning; one of the leading causes of hair-dye allergic dermatitis.
Skin benefits
- Permanent oxidative hair-dye precursor
- Wide shade range
Known concerns
- EU Annex III restricted (max 2% in hair dye, must carry warning)
- Strong skin sensitiser — frequent ACD culprit
- Banned in eyelash/eyebrow dyes
- Acute toxicity if ingested
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related hair dyes
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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.