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Description and features

Catonium TBAB (Tetrabutylammonium Bromide) is a white powder, its chemical formula is C16H36BrN. TBAB is a quaternary ammonium salt and is one of the most widely used phase transfer catalysts. It finds its application in pharmaceuticals, herbicides, polymers, powder coatings and zeolites. This material is highly soluble in water and methanol.

Tetrabutylammonium Bromide is also known as TBAB, IPC-TBA and N,N,N-tributylbutan-1-aminium bromide.


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

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

  • Also available with anti-caking agent or as solution in water.

This product (CAS: 1643-19-2) has been registered (FULL SUBSTANCE) under REACH (EC) 1907/2006.

Product Identification

CAS number 1643-19-2
EC numer: 216-699-2
HS code:2923 90 00
Sensitivity Hygroscopic


AppearanceWhite to off white crystalline powder
Assay≥ 99.0 %
Melting point100 – 104 °C
Water content (by KF)≤0.50 %
Amine and amine salt ≤0.50 %


CatOnium TBAB (Tetrabutylammonium Bromide) is being used in: (powder) coatings, (fluoro)elastomers, herbicides, (powder coating) resins, and zeolites.


Available packaging: 20 / 25 KG fiber drums.
Special packaging is available on request.


Store tetrabutylammonium bromide cool, dry and well-ventilated area and in line with legal requirements.
Keep CatOnium TBAB away from heat sources and oxidizing agents.


A Material Safety Data Sheets (MSDS) is available for CatOnium TBAB 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 formula C16H36BrN
Molecular weight 322.37 g/mol
Smiles notation [Br-].CCCC[N+](CCCC)(CCCC)CCCC
Structural formula 1643-19-2

Physicochemical information

Bulk density 644 kg/m3 (35 ºC)
Flash point 100 ºC @ 960 hPa
Melting point 96.70 ºC @ 960 hPa
Partition coefficient (log Pow) 1.7115
pH value 6.48 @ 30 ºC
Solubility in methanol 100% @ 35ºC
Solubility in water 1000 g/l @ 35ºC
Vapour pressure 0.000000000796 mm Hg

Tetrabutylammonium Bromide | CAS: 1643-19-2 | 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.