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Description and features

Catonium TPAB (Tetrapropylammonium Bromide) is a white powder, its chemical formula is C12H28BrN. TPAB is a quaternary ammonium salt and is used as a structure directing agent in the synthesis of zeolites. Further it is used as phase transfer catalyst  in pharmaceuticals. This material is highly soluble in water and methanol.

Tetrapropylammonium Bromide is also known as TPAB, TPABR, tetrapropylazanium bromide and tripropyl ammonium bromide.


Europe and United States: Provided CatOnium TPAB is on stock in our local warehouses our lead time is about one week if delivered in 25 KG drums.

Canada,  South America,  South Africa and other markets can also be served, please contact our sales department for more details.

Limited available in the European Union as this product has not been REACH registered (yet).

Product Identification

CAS number1941-30-6
EC number217-727-6
HS code2923 90 00


Appearance White to off white crystalline powder
Assay≥ 99.00 %
Colour Hazen ≤ 50
Free amine hydrobromide≤ 0.40 %
Water content≤ 0.50 %


CatOnium TPAB (Tetrapropylammonium Bromide) is being used in: zeolites.


Available packaging: 25 KG / 50 KG fiber drums.
Special packaging is available on request.


Store Tetrapropylammonium Bromide in a cool, dry and well-ventilated area and in line with legal requirements.

Keep TPAB away from heat sources and oxidizing agents.


A Material Safety Data Sheets (MSDS) is available for CatOnium TPAB and all other products supplied by Vesta Chemicals BV.

An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.

Molecular and structural information

Molecular formulaC12H28BrN
Molecular weight266.26 g/mol
Smiles notation [N+](CCC)(CCC)(CCC)CCC.[BrH-]
Chemical formula 1941-30-6 Tetrapropylammonium Bromide

Physicochemical information

Boiling pointNot tested
Flash point270 ºC
Melting point260 – 270 °C
Partition coefficient (log Pow)< -0,30 @ 20 ºC
pH value 5 -7 (100 g/l, H2O)
Solubility in waterSoluble
Vapor pressure (MGM)Not tested
Tetrapropylammonium Bromide | CAS: 1941-30-6 | Disclaimer. This information is supplied solely for informational purposes and Vesta Chemicals bv makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.