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BEHENTRIMONIUM METHOSULFATE

Last update on Apr 17, 2026

Behentrimonium Methosulfate is a quaternary ammonium salt and is mainly used as an antistatic, conditioning, softening, hydrating agent in hair care products. It is also useful for improving the texture of the product. It is in the form of white or off-white solid and is positively charged. It is often compared with Behentrinonium Chloride, which is derived from canola oil and functions primarily as a conditioning agent in hair care products. The key difference is that behentrimonium chloride does not require a stabilizing agent, while behentrimonium methosulfate requires a stabilizing agent.

CAS Number: 81646-13-1 / 241148-21-0Chem/IUPAC Name: docosyl(trimethyl)azanium;methyl sulfateEINECS/ELINCS No: 279-791-1COSING REF No: 74588

Products with BEHENTRIMONIUM METHOSULFATE

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Conditioner BMS

by Jan Dekker

INCI: CETEARYL ALCOHOL | BEHENTRIMONIUM METHOSULFATE

Sustainable option

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EcoStable™ OliveStress

by Ecocos Biotechnologies

Sustainable option

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JACATIS BTMS

by Hangzhou Jarsin Chemical Technology

INCI: BEHENTRIMONIUM METHOSULFATE

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What is BEHENTRIMONIUM METHOSULFATE used for?

Behentrimonium Methosulfate is used in skin care and hair care products.

Hair care: It is used in hair & beard care products such as conditioners, hair masks, shampoos. It reduces the friction between the hair shafts by neutralizing electrical charges, providing slip, and improving the combing, general feel, and manageability of the hair. Reduction in friction between the hair shafts may also help to reduce breakage and damage. It creates a thin film on the hair, which helps to protect the hair from moisture loss. This is very helpful for high porosity hair-type that quickly gets depleted of moisture. This ingredient is used specifically in shampoos and conditioners for curly hair, to restore hydration leaving it softer and shinier
Skin care: In the skincare industry, it is used in lotions, creams, facial cleanser, soap, foot moisturizer, hand cream etc. It acts as a surfactant by reducing the surface tension and contributes to the even distribution of the product when it is used. It also has the added benefit of improving the texture of the product. It helps to improve the spreadability and usability of the formulation

Origin

Behentrimonium methosulfate is an ammonium salt that is derived from rapeseed oil. This plant is of the Brassicaceae family and has bright yellow flowers.

What does BEHENTRIMONIUM METHOSULFATE do in a formulation?

ANTISTATIC|

HAIR CONDITIONING|

SKIN CONDITIONING|

FILM FORMING|

SURFACTANT

Safety Profile

Behentrimonium methosulfate is considered safe for cosmetic use per the CIR Expert Panel assessment of quaternary ammonium compounds. It has a low to moderate hazard rating from EWG (typically 1-3) and is generally well-tolerated on the scalp and hair. However, it may cause allergies, skin & eye irritation in some people.