Description

5-Isobenzofurancarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-, 5,5'-[(1-Methylethylidene)Di-4,1-Phenylene] Ester is a high-purity specialty chemical intermediate of significant importance in advanced polymer synthesis. This compound matters for its role as a key building block in the production of high-performance polyimides and other engineering plastics, offering enhanced thermal stability and mechanical properties. It is primarily needed by R&D laboratories and industrial manufacturers in the electronics, aerospace, and automotive sectors seeking to develop next-generation materials.

Application

• Polymer Intermediate: A critical monomer for the synthesis of high-temperature, high-performance polyimides and polyamide-imides.
• Electronic Materials: Used in the production of dielectric films, flexible printed circuit boards (FPCBs), and semiconductor encapsulation materials.
• Advanced Composites: Serves as a resin precursor for aerospace and automotive composites requiring exceptional heat resistance and strength-to-weight ratios.
• Adhesives & Coatings: Incorporated into formulations for high-temperature resistant adhesives, wire enamels, and protective coatings.
• Research & Development: Utilized in academic and industrial R&D for developing novel polymeric materials with tailored properties.
• Specialty Chemical Synthesis: Acts as a versatile intermediate for creating other functionalized chemical compounds.

Basic Information

Product Name	5-Isobenzofurancarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-, 5,5'-[(1-Methylethylidene)Di-4,1-Phenylene] Ester
CAS No.	2770-50-5
Molecular Formula	C25H14O8
Molecular Weight	442.38 g/mol
Synonyms	4,4'-(1-Methylethylidene)bis[1,3-isobenzofurandione, 5,5'-ester]; Bisphenol A dianhydride ester; 5,5'-(Isopropylidenedi-p-phenylene) bis(1,3-isobenzofurandione); Bisphenol A bis(trimellitate) dianhydride; BTDA ester; 1,3-Dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid 5,5'-[(1-methylethylidene)di-4,1-phenylene] ester; 2770-50-5; Bisphenol A dianhydride trimellitate ester.
EINECS	Contact for details

Quality Control

Our 5-Isobenzofurancarboxylic Acid, 1,3-Dihydro-1,3-Dioxo-, 5,5'-[(1-Methylethylidene)Di-4,1-Phenylene] Ester is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the exacting standards required for polymer synthesis. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong bases and oxidizing agents. The container must be kept tightly sealed to minimize exposure to atmospheric moisture.

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	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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