pH Adjuster
Ammonia
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Ammonia — the classic alkali for permanent hair dyes. Effective but irritating to eyes, lungs and skin; strictly capped in cosmetic use.
Skin benefits
- Strong base for hair-dye chemistry
- Opens hair cuticle for color penetration
- Decades of professional use
Known concerns
- Strong respiratory and eye irritant
- Skin burns at high %
- EU Annex III restricted concentrations
- Sensitization in salon staff
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 — always read the physical product label and consult a healthcare professional for personal concerns.