ChemConx BTMS 25 Emulsifier

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BTMS 25%

Behentrimonium Methosulfate Cationic Emulsifying Conditioner 

The ChemConx BTMS-25 Behentrimonium Methosulfate / BTMS 25% is a natural, cationic conditioning emulsifier typically used in quality hair and skin care formulations. It is derived from what is commonly called rapeseed oil.

BTMS-25 CA Behentrimonium Methosulfate Emulsifying Cationic Surfactant Conditioner is  used for formulating hair conditioners, conditioning shampoos, and used in creams and lotions.

BTMS 25 is both a mild primary emulsifier and an excellent conditioning agent, providing elegant cationic emulsions for both hair and skin care formulations.

In hair conditioners BTMS CA gives users an improved wet comb and leaves hair with noticeable body and spring. Plus , it is perfect for using in leave-in conditioners. BTMS CA 25 leaves excellent detangling properties in hair conditioner products. 

When used in creams they resist wash off, leaving a nice after feel on skin.

BTMS CA 25 can also emulsify many silicones (up to 50% in a formulation) and it is an excellent suspending agent.

Our BTMS 25  is a solid blend of 25% behentrimonium methosulfate in cetearyl alcohol. The active compound is comprised of a positively charged quaternary ammonium salt coupled with a fatty carbon chain. The cationic part deposits towards negatively charged surfaces such as hair, while the long carbon chain imparts a smooth and conditioned after feel. The second component, cetearyl alcohol, is a nonionic surfactant used to support the development of the lamellar structure of the formulation. Its inverted conical shape helps with the packing parameter of the quaternary ammonium compound, improving the viscosity of the formula and the spreadability of the conditioner. In addition, cetearyl alcohol imparts additional lubricity to the hair, making it a smart conditioning ingredient.

Compatibility In conditioning systems, BTMS 25 CA can be used in combination with other cationic surfactants to allow for fine tuning of conditioning properties, after feel as well as wet and dry combing.

In shampoo systems, BTMS 25 CA is also compatible with non ionic surfactants. In anionic surfactants, it can react to form electroneutral salts only poorly soluble in water. To avoid this reaction, an excess of the anionic compound should be used. pH stability

It can also be used as a co-emulsifier with Emulsifying Wax NF, adding its conditioning properties to emulsions

The typical use concentration can be between 1.0 to 5.0% depending on hair type and grade of hair damage

As a quaternary ammonium salt our BTMS 25 CA has excellent stability over a wide pH range. It differs from tertiary amines in that the cation persists also in alkaline medium.

INCI Name and CAS No.

  • INCI NameBehentrimonium Methosulfate (and) Cetearyl Alcohol
  • CAS no: 81646-13-1 & 36653-82-4/112-92-5
  • Chemical NameBehenyltrimethylammoniummethosulfate 25 % Active


  • Appearance (20 °C): White pellets/ Pastilles
  • Odor Characteristic: Typical - (cetearyl alcohol)
  • Active: 25%
  • Water Max.: 1%
  • Free amine Max.: 2.0%
  • Cetearyl alcohol Approx.: 75%

Use in Cosmetics and Shampoo Crafting

BTMS 25 is both a mild primary emulsifier and an excellent conditioning agent, providing elegant cationic emulsions for both hair and skin care formulations.


The product should be stored under ambient conditions in the original sealed packaging. Further information on handling.

Shelf Life

Under optimal storage conditions, in original unopened drums/containers, minimum two years.

Safety Data Sheet

Certificate of Analysis


6 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Susanne Barker on Apr 10th 2021

    Not a darn thing wrong with it. Works exactly as you want

  • 5
    BTMS 25

    Posted by Josavelle Ramos on Feb 26th 2021

    It is a great emulsifier, specially when combine it with BTMS 50 to have and in between. Love it

  • 5
    It´s a great product. My order arrived in a timely manner.

    Posted by Alejandra on Jul 10th 2020

    It´s a great product.

  • 5
    Conditioner bars

    Posted by Mary Hobbs on May 26th 2020

    Excellent product and will buy again!

  • 5
    BTMS 25 Emulsifier

    Posted by Ju on May 9th 2020

    Excellent high quality BTMS 25 Emulsifier. I am based in Uk but always order from Make Your Own company due to high quality products, great prices, fair international shipping and more importantly great customer service everytime.

  • 5
    BTMS 25 Emulsifying Conditioner

    Posted by tammy on Aug 22nd 2018

    I wish I order more... Its wonderful.