Behentrimonium Methosulfate
Explained
Behentrimonium Methosulfate is a gentle, positively-charged conditioning agent made from rapeseed oil.
It's the opposite of a harsh cleansing sulfate despite having "sulfate" in its name; its a detangler/softener in haircare and helps keep oil/water blended into a creamy texture as an emulsifier.
Concentration-wise, safety review reports the wider trimonium family shows up between 0.0005% to 10% in rinse-off products and 0.001% to 4% in leave-on products.
This ingredient is commonly used at ~1–5% when acting as the emulsifier.
Allergies to this ingredient are rare; the CIR panel noted the literature lacks clinical reports of irritation or sensitization and patch tests on finished products containing it came back clean.
See all 1,244 products with Behentrimonium Methosulfate
