Oxidative hair dye coupler
6-Hydroxy-3,4- dimethyl-2-pyridone
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A pyridone-based oxidative hair dye coupler used in permanent hair colour formulations. Approved at up to one percent in EU hair dyes following SCCP review, with sensitization the main concern.
Skin benefits
- Functions as oxidative hair dye coupler
- Approved hair dye agent at up to 1% in EU
Known concerns
- Skin sensitization risk typical of hair dye couplers
- Patch testing strongly advised before use
- Should not contact skin beyond brief application
- SCCP has reviewed safety with conditional opinions
References
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.