Description

Tetramethylenebis(Triphenylphosphonium Bromide) is a high-purity, bifunctional phosphonium salt widely utilized as a key reagent in advanced organic synthesis. Its primary commercial value lies in its role as a robust and efficient Wittig reagent for the synthesis of complex alkenes and as a versatile phase-transfer catalyst. This compound is essential for research and production in the pharmaceutical, agrochemical, and specialty chemical industries, where precise molecular construction is critical.

Application

• As a bifunctional Wittig reagent for the synthesis of conjugated dienes and polyenes in pharmaceutical intermediates.
• As a phase-transfer catalyst (PTC) in alkylation, esterification, and other two-phase organic reactions.
• In the preparation of yildes for carbon-carbon bond formation in fine chemical synthesis.
• As a precursor for the synthesis of phosphorus-containing ligands used in homogeneous catalysis.
• In material science research for the surface modification of polymers and nanoparticles.
• For the stereoselective synthesis of natural products and complex organic molecules in R&D laboratories.

Basic Information

Item	Details
Product Name	Tetramethylenebis(Triphenylphosphonium Bromide)
CAS No.	680579-51-5
Molecular Formula	C40H38Br2P2
Molecular Weight	724.48 g/mol
Synonyms	1,4-Bis(triphenylphosphonio)butane dibromide; Tetramethylene bis(triphenylphosphonium) bromide; Butane-1,4-diylbis(triphenylphosphonium) dibromide; 1,4-Bis(triphenylphosphoranylidene)butane dibromide (common name for ylide form); TPPB; Bis(triphenylphosphonium) butane dibromide
EINECS	Contact for details

Quality Control

Our Tetramethylenebis(Triphenylphosphonium Bromide) is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation by NMR and IR spectroscopy, to ensure it meets the high standards required for synthetic applications. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere or in a desiccator after opening to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%

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