Behentrimonium Chloride is a quaternary ammonium compound used primarily in hair and skin care as a conditioning, antistatic, and emulsifying agent. It helps detangle, soften, and smooth by depositing onto the surface, and also has mild preservative and antimicrobial properties.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation | Uncommon | Mild stinging or redness can occur, more likely at higher concentrations or with leave-on products. |
| Allergic contact dermatitis | Rare | Sensitization to quaternary ammonium compounds has been reported in patch-test studies. |
| Eye irritation | Uncommon | Can cause irritation on direct ocular contact, relevant in rinse-off hair products. |
| Scalp or skin dryness | Rare | Occasional reports with frequent use, though it is generally well tolerated at typical concentrations. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.