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Colorant

2,5,6-TRIAMINO-4-PYRIMIDINOL SULFATE

CAS 1603-02-7
40

Safety score · 0–100

Moderate

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

A pyrimidine-based oxidative hair dye coupler used in permanent hair colour. Like other dye intermediates it carries skin-sensitization risk and is regulated in the EU.

Function

HAIR DYEING

Skin benefits

  • Hair coloring (oxidative coupler)

Known concerns

  • Skin sensitization risk
  • Eye irritation
  • EU Annex hair-dye restrictions

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.