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Behentrimonium methosulfate

Behentrimonium methosulfate suppliers and sourcing guide

Behentrimonium methosulfate is a quaternary ammonium compound with a C22 (behenyl) chain. The behenyl chain usually comes from high-erucic rapeseed oil, whose erucic acid is hydrogenated to behenic acid; the fatty amine made from it is quaternized with dimethyl sulfate. It is rarely sold alone: brands buy waxy pastilles that blend it with fatty alcohols, known as BTMS-25 or BTMS-50, which work as self-emulsifying bases for hair conditioners, leave-in products and lotions.

See suppliersWhat to ask for on the COA
Also known as
BTMS · Docosyltrimethylammonium methyl sulfate · BTMS-25 · BTMS-50
Facts checked
November 2026

Forms and grades of behentrimonium methosulfate

Suppliers sell different products under the same name. Specify the one you need.

  • BTMS-25

    About 25% behentrimonium methosulfate in cetearyl alcohol; the common blend for conditioners.

  • BTMS-50

    About 50% behentrimonium methosulfate with cetyl alcohol and butylene glycol; gives more conditioning per gram than BTMS-25.

  • Behentrimonium chloride

    The chloride salt, sold as a separate ingredient, often as a solution or paste.

What to check on the COA

Compare each result with your own specification when the lot arrives.

Active quat content
Percent cationic active by two-phase titration against an anionic surfactant standard; it sets the use level in a formula and is the main lot-to-lot number to record.
Free amine and amine salt
Unquaternized amine left from manufacture, by titration, reported against the supplier's limit.
Melting point
Melting range of the pastilles, which reflects the fatty alcohol blend.
pH
pH of a stated aqueous dispersion.
Color
Gardner or APHA color of the melt or a dispersion.

Storage, lots and expiry

Storage and shelf life

Store pastilles sealed in a cool, dry place away from heat, which can soften and fuse them. They are stable in normal storage. Shelf life follows the supplier's specification, with a retest of active content and color for older stock.

Lots and expiry dates

Active content and the fatty alcohol blend vary slightly by lot and by producer, so record the active content for each lot. Do not swap BTMS-25 and BTMS-50 at the same percentage, since they carry different amounts of active and different fatty alcohols.

Regulatory status

Facts from regulators and standards bodies, each linked to its source.

This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.

Behentrimonium methosulfate suppliers

Manufacturers and distributors whose own websites say they sell it.

We are checking behentrimonium methosulfate suppliers now

Every listing is checked against the supplier’s own website before it goes live, so this list fills in over the coming weeks. The specs and COA checklist above are ready today.

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Frequently asked questions

What forms of behentrimonium methosulfate can brands buy?

Common forms include bTMS-25, bTMS-50 and behentrimonium chloride. Ask each supplier for the specification sheet of the exact grade they quote.

What should the COA for behentrimonium methosulfate include?

Expect active quat content, free amine and amine salt, melting point, pH and color, each with its method, specification and result for that lot.

How should behentrimonium methosulfate be stored?

Store pastilles sealed in a cool, dry place away from heat, which can soften and fuse them. They are stable in normal storage. Shelf life follows the supplier's specification, with a retest of active content and color for older stock.

What is the regulatory status of behentrimonium methosulfate?

Health Canada's Natural Health Products Ingredients Database lists behentrimonium methosulfate with the non-medicinal purpose antistatic agent, for topical use.

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