Hair Conditioning
POLYQUATERNIUM-105
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 in the polyquaternium family — same safety profile as polyquaternium-106 and 107. Mild and effective in hair care with the usual rinse-off caveats.
Function
Skin benefits
- Smooths and conditions hair
- Reduces static and frizz
- Improves wet/dry combability
- Mild on most users
Known concerns
- Cationic — eye irritation in poorly formulated rinse-off
- Quaternary polymers don't fully biodegrade
- Thin direct safety review for this number
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related hair conditionings
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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.