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Ingredient · Emulsifier

Behentrimonium methosulfate

Cleaner · 7/10, higher is cleaner

How we reached this

Quaternary ammonium conditioner — milder than older quats like behentrimonium chloride. EWG hazard 1-2. Common in baby hair conditioners and detanglers.

Sources · 1

Products containing this · 2

About this rating

Ratings run 1–10, higher is cleaner, and are set editorially against the sources above — see the methodology page for how an ingredient rating becomes part of a product score. Last reviewed 2026-05-25.