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Hair Conditioning

POLYQUATERNIUM-90

CAS - Updated
70

Safety score · 0–100

Fine

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

About

A positively charged conditioning polymer that clings to hair to detangle and reduce frizz. Polyquaternium-family ingredients are generally rated safe by CIR.

Skin benefits

  • Conditioning film for hair softness and detangling
  • Reduces static and frizz
  • Improves wet combing

Known concerns

  • Cationic polymer, can build up on hair with repeated use
  • Eye irritation potential in rinse-off if not adequately diluted
  • Limited CIR data on Polyquaternium-90 specifically

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.