Description

4,4′-{[1,4-Phenylenebis(Methylene)]Bis(Oxy)}Dibenzoic Acid is a high-purity aromatic dicarboxylic acid derivative that serves as a critical building block in advanced polymer synthesis. This compound matters for its ability to introduce rigid, symmetrical biphenyl ether linkages into polymer backbones, directly influencing material properties like thermal stability and mechanical strength. It is primarily needed by R&D chemists and production engineers in the pharmaceutical intermediates, liquid crystal polymers (LCPs), and high-performance engineering plastics sectors.

Application

• Monomer for High-Performance Polymers: A key raw material for synthesizing polyarylates, polyamides, and polyesters, especially for applications requiring high thermal resistance.
• Liquid Crystal Polymer (LCP) Production: Used as a comonomer to create rigid-rod segments in LCPs for electronics, aerospace, and automotive components.
• Pharmaceutical Intermediate: Serves as a sophisticated precursor in the synthesis of complex active pharmaceutical ingredients (APIs) and drug candidates.
• Crosslinking Agent: Functions as a crosslinker in specialty epoxy resins and coatings to enhance hardness and chemical resistance.
• Material Science Research: Employed in academic and industrial R&D for developing novel organic frameworks and functional materials.
• Specialty Chemical Synthesis: A versatile intermediate for creating complex ligands, dyes, and photoactive compounds.

Basic Information

Product Name	4,4′-{[1,4-Phenylenebis(Methylene)]Bis(Oxy)}Dibenzoic Acid
CAS No.	47593-50-0
Molecular Formula	C28H22O6
Molecular Weight	454.47 g/mol
Synonyms	1,4-Bis[(4-carboxyphenoxy)methyl]benzene; p-Xylylenebis(4-carboxyphenyl ether); 4,4'-(1,4-Phenylenedimethylene)dioxydibenzoic Acid; BPH-4C; [1,4-Phenylenebis(methylene)]bis(oxy)dibenzoic Acid; 4,4'-(p-Xylylenedioxy)dibenzoic Acid; Bis(4-carboxyphenoxymethyl)benzene; Contact for details on trade names.
EINECS	Contact for details

Quality Control

Our 4,4′-{[1,4-Phenylenebis(Methylene)]Bis(Oxy)}Dibenzoic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements for polymer and pharmaceutical applications. Certificates of Analysis (COA) with detailed chromatographic data are available upon request.

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 nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Heavy Metals	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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