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Hair Conditioning

POLYQUATERNIUM-24

CAS 98616-25-2
65

Safety score · 0–100

Fine

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

A polyquaternium hair-conditioning polymer used in shampoos and styling products. Mild and effective at typical levels; environmental persistence is the class-level concern.

Function

ANTISTATICFILM FORMING

Skin benefits

  • Hair conditioning quaternary polymer
  • Reduces static and improves combability
  • Film former in styling products
  • Mild at typical use levels

Known concerns

  • Quaternary polymer — slow biodegradation
  • Possible eye irritant at high concentration
  • Limited dedicated CIR review for this PQ 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, so always read the physical product label and consult a healthcare professional for personal concerns.