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Hair Conditioning

QUATERNIUM-91

Updated
68

Safety score · 0–100

Fine

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

About

A modern conditioning quaternary ammonium salt found in hair-care emulsifier blends. Generally well tolerated; main concerns are eye sting and water toxicity.

Skin benefits

  • Light hair conditioning quat
  • Anti-static and detangling
  • Used in conditioner emulsifier blends

Known concerns

  • Eye irritation potential
  • Aquatic toxicity of quats
  • Limited independent data

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 — always read the physical product label and consult a healthcare professional for personal concerns.