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Hair Conditioning

POLYQUATERNIUM-91

CAS 1020103-28-9 Updated
72

Safety score · 0–100

Fine

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

About

A cationic conditioning polymer used in hair care for smoothness and anti-frizz. Standard polyquaternium safety profile with the usual rinse-off and biodegradation caveats.

Function

FILM FORMINGHAIR CONDITIONING

Skin benefits

  • Smooths and conditions hair
  • Reduces static and frizz
  • Improves combability when wet
  • Good film former on hair

Known concerns

  • Cationic — eye irritation if poorly formulated
  • Quaternary polymers have low biodegradability
  • Thin direct safety review for this number

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.