Description

4,4'-Carbonyldiphthalic Acid is a high-purity, multifunctional aromatic dicarboxylic acid derivative, serving as a critical building block in advanced material synthesis. Its unique molecular structure, featuring two phthalic acid units linked by a carbonyl bridge, enables the creation of polymers with exceptional thermal stability and tailored mechanical properties. This compound is essential for research and production in the polymer, specialty chemical, and pharmaceutical intermediate sectors, where precise molecular architecture is paramount.

Application

• Polymer Synthesis: A key monomer for producing high-performance polyimides, polyamides, and polyesters, imparting excellent heat resistance and mechanical strength to engineering plastics and films.
• Liquid Crystal Polymers (LCPs): Used as a comonomer in the manufacture of LCPs for electronics, aerospace, and automotive applications requiring dimensional stability and chemical resistance.
• Pharmaceutical Intermediates: Serves as a sophisticated precursor in the synthesis of complex active pharmaceutical ingredients (APIs) and diagnostic agents.
• Crosslinking Agent: Functions as a crosslinker in epoxy resin systems and coatings to enhance network density, thermal performance, and durability.
• Organic Synthesis: A versatile intermediate for constructing complex organic molecules, including dyes, pigments, and ligands for metal-organic frameworks (MOFs).
• Adhesive & Sealant Formulations: Incorporated to improve the high-temperature performance and adhesion properties of advanced industrial adhesives.

Basic Information

Product Name	4,4'-Carbonyldiphthalic Acid
CAS No.	2479-49-4
Molecular Formula	C17H10O9
Molecular Weight	358.26 g/mol
Synonyms	4,4'-Carbonylbis(phthalic acid); 4,4'-(Carbonylbis(oxy))diphthalic acid; 4,4'-Oxydiphthalic acid ketone derivative; Bis(3,4-dicarboxyphenyl) ketone; 5,5'-Carbonylbis(isobenzofuran-1,3-dione) hydrolysis product; [1,1'-Biphenyl]-4,4'-dicarboxylic acid, 3,3',5,5'-tetracarboxy-; Tetracarboxybenzophenone
EINECS	219-614-6

Quality Control

Our 4,4'-Carbonyldiphthalic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for high-end applications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with every shipment to guarantee traceability and batch-to-batch consistency.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product stability and performance. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%
Single Maximum Impurity (HPLC)	≤ 0.5%

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