Cationic conditioning polymer
POLYQUATERNIUM-18
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A cationic polymer used in rinse-off and leave-on hair products to deposit a smooth conditioning film that reduces static, improves wet combability and softens the feel of fibers.
Skin benefits
- Cationic conditioning polymer for hair and skin
- Reduces static and improves combability
- Forms a smooth conditioning film
- Generally low irritation potential
Known concerns
- Quaternary ammonium structure can be eye-irritating at high levels
- Not readily biodegradable
- Limited public toxicology data versus other polyquats
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related cationic conditioning polymers
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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.