Tetra-n-butylammonium bromide

Tetra-n-butylammonium bromide (TBAB) is a quaternary ammonium salt with a bromide counterion commonly used as a phase transfer catalyst. It is used to prepare many other tetrabutylammonium salts via salt metathesis reactions. Tetra-n-butylammonium bromide (TBAB) is a quaternary ammonium salt with a bromide counterion commonly used as a phase transfer catalyst. It is used to prepare many other tetrabutylammonium salts via salt metathesis reactions.