Description

4-Bromobenzenediazonium Tetrafluoroborate is a versatile and highly reactive diazonium salt, primarily valued as a key building block for introducing the 4-bromophenyl group into complex molecular architectures. Its primary commercial significance lies in its role as a crucial intermediate in the synthesis of advanced materials, pharmaceuticals, and agrochemicals. This compound is essential for researchers and manufacturers in the fine chemical, pharmaceutical, and material science industries who require reliable, high-purity intermediates for coupling reactions and functional group transformations.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, particularly those containing biphenyl or aryl ether structures.
• Agrochemical Synthesis: Used in the manufacture of herbicides, fungicides, and other crop protection agents where the bromophenyl moiety is a critical functional group.
• Material Science & Polymer Chemistry: Serves as a monomer or functionalization agent for creating specialized polymers, liquid crystals, and organic electronic materials.
• Dye & Pigment Manufacturing: Employed in the production of azo dyes and complex organic pigments through diazo coupling reactions.
• Cross-Coupling Reactions: An essential reagent in palladium-catalyzed cross-coupling reactions (e.g., Suzuki, Heck) for constructing complex biaryl systems in research and development.
• Organic Synthesis Reagent: A versatile reagent for nucleophilic aromatic substitution and other transformations in academic and industrial R&D laboratories.

Basic Information

Product Name	4-Bromobenzenediazonium Tetrafluoroborate
CAS No.	673-40-5
Molecular Formula	C6H4BBrF4N2
Molecular Weight	270.82 g/mol
Synonyms	p-Bromobenzenediazonium Tetrafluoroborate; 4-Bromobenzenediazonium Fluoborate; Diazonium, (4-bromophenyl)-, tetrafluoroborate(1-); (4-Bromophenyl)diazonium Tetrafluoroborate; Benzenediazonium, 4-bromo-, tetrafluoroborate(1-); BFB; 4-BBDT; 4-Bromophenyl Diazonium BF4 Salt
EINECS	211-610-9

Quality Control

Our 4-Bromobenzenediazonium Tetrafluoroborate is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including HPLC for assay and purity, NMR for structural confirmation, and KF titration for moisture content. A comprehensive Certificate of Analysis (COA) detailing all test results and specifications is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic and light-sensitive nature, the container must be kept tightly sealed in a desiccated environment and handled under inert atmosphere when appropriate to prevent decomposition and moisture absorption.

Specification

Item	Specification
Appearance	Off-white to light beige crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Solubility Test	Freely soluble in acetonitrile, DMF; decomposes in water

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