Hair Conditioning
Hydroxypyridinone and its salts, when used as a substance in hair dye products
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A heterocyclic hair-dye intermediate restricted under EU Annex III. Permitted at strict concentrations but flagged for skin and respiratory sensitisation — patch testing is recommended before each use.
Skin benefits
- Functions as a hair dye intermediate under EU Annex III restrictions
Known concerns
- Skin and respiratory sensitisation potential
- Requires strict purity and concentration controls
- Permitted only in hair dye products, not for skin contact products
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related hair conditionings
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.