Tetrapropylammonium bromide

Tetrapropylammonium bromide (CAS 1941-30-6), commonly abbreviated as TPABr, is a quaternary ammonium salt used as a phase-transfer catalyst and structure-directing agent in chemical synthesis. It enables efficient transfer of reagents between immiscible phases, accelerating reactions that would otherwise require harsh conditions or exotic solvents in industrial processes.

In pharmaceutical manufacturing, TPABr facilitates phase-transfer catalysis in the synthesis of active pharmaceutical ingredients, improving yields and reducing solvent consumption in multi-step organic reactions. It functions as a structure-directing agent in the hydrothermal synthesis of zeolites, particularly ZSM-5 and related microporous materials used in catalytic cracking and adsorption processes.

In biotechnology and life sciences, it is used as a reagent in nucleic acid extraction protocols and as a counter-ion agent in ion-pair chromatography for precise analytical results. TPABr also exhibits biocidal activity against a range of microorganisms, supporting its evaluation in preservation systems for industrial formulations and specialized chemical applications.

Tetrapropylammonium bromide is supplied as a white crystalline powder or granular solid. It is available in technical and high-purity grades for pharmaceutical and zeolite synthesis applications. Reagent-grade and synthesis-grade specifications are commonly offered. Packaging ranges from laboratory-scale quantities to bulk industrial supply depending on specific application requirements.