Polyquaternium-67 is a cationic cellulose-derived polymer used in hair and skin care formulations to provide conditioning, improve sensory feel, and stabilize formulations. It functions as a film-former and slip agent rather than a therapeutic active.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin or scalp irritation | Rare | Occasional transient irritation, more likely in high concentrations or on sensitive skin. |
Eye irritation | Rare | Possible stinging if formulation contacts eyes, as with many surfactant-associated polymers. |
Allergic contact sensitization | Very rare | Cationic polymers are generally low-sensitizing; reports are uncommon. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.