Description

Tetrabutylphosphonium Bromide is a versatile quaternary phosphonium salt with significant utility in organic synthesis and materials science. Its primary value lies in its role as a highly effective phase-transfer catalyst and a precursor for ionic liquids, enabling critical chemical transformations and the development of advanced materials. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking efficient catalytic systems and novel electrolytes.

Application

• Phase-Transfer Catalyst (PTC): Widely employed to facilitate reactions between reagents in immiscible phases, particularly in alkylation, esterification, and polymerization processes.
• Ionic Liquid Precursor: Serves as a key starting material for synthesizing tetraalkylphosphonium-based ionic liquids, which are used as "green" solvents, electrolytes, and lubricants.
• Polymerization Catalyst/Additive: Used in the production of epoxies, polycarbonates, and other polymers to control reaction kinetics and final product properties.
• Extraction & Separation Agent: Applied in the extraction of metals and organic compounds due to its ion-exchange properties.
• Pharmaceutical Intermediate: Acts as a building block or catalyst in the synthesis of active pharmaceutical ingredients (APIs).
• Corrosion Inhibitor: Formulated into coatings and treatment fluids for industrial equipment protection.

Basic Information

Product Name	Tetrabutylphosphonium Bromide
CAS No.	3115-68-2
Molecular Formula	C16H36BrP
Molecular Weight	339.34 g/mol
Synonyms	TBPB; Tetra-n-butylphosphonium Bromide; Phosphonium, tetrabutyl-, bromide; Butylphosphonium Bromide; Tetrabutylphosphonium Bromide Salt; Tributyl(butyl)phosphonium Bromide; (Tetrabutylphosphonio)bromide
EINECS	221-500-5

Quality Control

Our Tetrabutylphosphonium Bromide is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay (HPLC), identification (IR, NMR), and impurity profiling, to ensure it meets the high standards required for research and industrial applications. Certificates of Analysis (COA) documenting purity, physical properties, and safety data are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under dry conditions to prevent degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	97 - 102 °C
Loss on Drying	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.