Description

Diphenylmethane-4,4'-Dicarboxylic Acid is a high-purity aromatic dicarboxylic acid derivative, serving as a critical building block in advanced polymer synthesis and specialty chemical manufacturing. Its rigid biphenyl core structure enables the production of high-performance materials with enhanced thermal stability and mechanical properties. This compound is essential for R&D and production in industries such as polyesters, polyamides, liquid crystal polymers, and pharmaceutical intermediates.

Application

• Polymer Intermediate: A key monomer for synthesizing high-temperature resistant polyesters and polyamides (e.g., for engineering plastics).
• Liquid Crystal Polymers (LCPs): Used as a rigid-rod monomer to create LCPs for electronics, aerospace, and automotive components.
• Pharmaceutical Synthesis: Serves as a precursor or intermediate in the development of active pharmaceutical ingredients (APIs).
• Specialty Polyurethanes: Incorporated to enhance the thermal and chemical resistance of polyurethane coatings and elastomers.
• Epoxy Resin Modifier: Used to modify epoxy resin systems, improving their heat distortion temperature and rigidity.
• Organic Synthesis: A versatile building block in organic chemistry for creating complex molecules and ligands.
• Advanced Material Research: Employed in R&D for new high-performance polymers and composite materials.

Basic Information

Product Name	Diphenylmethane-4,4'-Dicarboxylic Acid
CAS No.	790-83-0
Molecular Formula	C15H12O4
Molecular Weight	256.25 g/mol
Synonyms	4,4'-Diphenylmethanedicarboxylic Acid; Bis(4-carboxyphenyl)methane; 4,4'-Methylenedibenzoic Acid; DPMDA; 4-Carboxyphenyl-4'-carboxyphenylmethane; [1,1'-Methylenebis(4,1-phenylene)]dicarboxylic Acid; α,α'-Diphenyl-4,4'-dicarboxylic Acid
EINECS	212-332-5

Quality Control

Our Diphenylmethane-4,4'-Dicarboxylic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity and consistency. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are provided with every shipment. We support compliance with global regulatory frameworks, including REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and sources of ignition.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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