The Lab
Specimen No. 0146
ClearedDerivedemulsifiersurfactant

Behentrimonium Methosulfate (BTMS)

behentrimonium methosulfate · btms · behentrimonium methosulfate and cetearyl alcohol

A plant-derived (rapeseed) quaternary emulsifier widely used in conditioning systems. Despite containing "sulfate" in its name, it is not a stripping sulfate — it conditions hair without buildup. Mild, gentle, and free of the sensitizing impurities associated with CAPB.

medium confidence
Researched April 18, 2026

Concerns

  • Environmental concern: quaternary ammonium compounds are toxic to aquatic organisms at high concentrations

Sourcing & processing

plant derived

Commonly found in

ConditionerHair maskLeave-in conditionerCo-wash

Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.

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LabelCleared verdict badge: Behentrimonium Methosulfate (BTMS) — Cleared
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