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Hair Conditioning

POLYQUATERNIUM-99

68

Safety score · 0–100

Fine

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

A cationic conditioning polymer used in hair-care for anti-static and wet-comb benefits. Standard polyquaternium safety profile: low-irritation in rinse-off, mild eye caution.

Function

FILM FORMING

Skin benefits

  • Conditioning cationic polymer
  • Substantive on hair, anti-static
  • Improves wet combing

Known concerns

  • Quaternary ammonium can mildly irritate eyes
  • Limited public CIR review for this PQ number
  • Possible scalp build-up

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