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Colorant

P-METHYLAMINOPHENOL SULFATE

CAS 150-75-4
35

Safety score · 0–100

Caution

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

Also known as Metol — an oxidative hair dye chemical with a long history of causing severe contact dermatitis. EU-restricted to 0.68% maximum; significant allergy risk so patch testing is essential.

Skin benefits

  • Effective oxidative hair dye intermediate

Known concerns

  • Strong skin sensitizer (Metol dermatitis)
  • EU Annex III restricted (max 0.68% as free base)
  • Known occupational allergen
  • Possible cross-reactivity with PPD
  • Patch test required

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.