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Hair dye intermediate

6-METHOXY-2,3-PYRIDINEDIAMINE HCL

CAS 94166-62-8
35

Safety score · 0–100

Caution

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

A methoxy pyridinediamine salt used as an oxidative hair dye coupler in salon colour. The aromatic diamine class carries documented sensitisation and genotoxicity concerns, leading to strict EU concentration limits.

Function

HAIR DYEING

Skin benefits

  • Functions as an oxidative hair dye coupler
  • Provides specific shades when combined with hair colour developers

Known concerns

  • Aromatic diamine class associated with skin sensitisation
  • Risk of severe allergic contact dermatitis in salon use
  • SCCS has restricted closely related pyridinediamines to capped concentrations
  • Potential genotoxicity flagged in screening assays

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.