Description

Para-Xylylenebis-(Triphenylphosphonium) is a high-purity, versatile organophosphonium salt widely used as a key intermediate in advanced organic synthesis. This compound is valued for its role as a robust Wittig reagent precursor, enabling the efficient formation of carbon-carbon double bonds to create complex olefins and specialty polymers. It is essential for R&D chemists and process engineers in the pharmaceutical, agrochemical, and advanced materials sectors seeking reliable, high-yield synthetic pathways.

Application

• Wittig Reaction Intermediate: A crucial precursor for generating reactive ylides used in the stereoselective synthesis of alkenes, dienes, and other unsaturated compounds.
• Pharmaceutical Synthesis: Employed in the construction of complex drug molecules, particularly those containing specific olefinic pharmacophores or as a building block for active pharmaceutical ingredients (APIs).
• Agrochemical Manufacturing: Used in the production of advanced crop protection agents, including certain herbicides and fungicides with tailored molecular structures.
• Polymer & Material Science: Serves as a monomer or cross-linking agent in the development of specialty polymers, functional coatings, and advanced electronic materials.
• Liquid Crystal & OLED Precursor: Acts as a key synthetic intermediate in the manufacture of organic light-emitting diode (OLED) materials and liquid crystal compounds.
• Academic & Industrial R&D: A valuable reagent for methodological development and exploratory chemistry in university and corporate research laboratories.

Basic Information

Product Name	Para-Xylylenebis-(Triphenylphosphonium)
CAS No.	40817-03-6
Molecular Formula	C44H38P22+ • 2X- (Typically X = Br or Cl)
Molecular Weight	~628.72 (for cation, C44H38P22+)
Synonyms	1,4-Bis(triphenylphosphoniomethyl)benzene dibromide; p-Xylylenebis(triphenylphosphonium) bromide; α,α'-Bis(triphenylphosphonio)-p-xylene dibromide; Bis(triphenylphosphoniummethyl)benzene; P,P'-(1,4-Phenylenedimethylene)bis(triphenylphosphonium) salt; WITTIG REAGENT PRECURSOR; [p-(Bis(triphenylphosphonio)methyl)benzene] dibromide; PQX
EINECS	Contact for details

Quality Control

Our Para-Xylylenebis-(Triphenylphosphonium) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including NMR, HPLC, and elemental analysis, to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and should be handled 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
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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