Description

4,5'-[Isopropylidenebis[(4,1-Phenylene)Oxy]]Bis(Isobenzofuran-1,3-Dione) CAS NO 53196-94-4 is a high-purity, specialized aromatic dianhydride monomer. This compound is a critical building block for the synthesis of advanced polyimides and other high-performance polymers, offering exceptional thermal stability and mechanical properties. It is essential for manufacturers in the electronics, aerospace, and specialty coatings industries seeking to develop materials for demanding applications.

Application

• Polyimide Synthesis: A key monomer for producing high-temperature, high-strength polyimide resins and films.
• Advanced Composites: Used in the manufacture of matrix resins for carbon fiber and fiberglass composites in aerospace and automotive sectors.
• Electronic Materials: Essential for creating dielectric layers, flexible printed circuit boards (FPCBs), and semiconductor encapsulation materials.
• High-Performance Coatings: Imparts heat resistance and durability in wire enamels and protective industrial coatings.
• Adhesives and Sealants: Serves as a precursor for polyimide-based adhesives used in extreme environments.
• Gas Separation Membranes: Used in the development of polymers for selective gas permeation applications.

Basic Information

Product Name	4,5'-[Isopropylidenebis[(4,1-Phenylene)Oxy]]Bis(Isobenzofuran-1,3-Dione)
CAS No.	53196-94-4
Molecular Formula	C31H18O8
Molecular Weight	518.47 g/mol
Synonyms	Bis[4-(1,3-dioxo-1,3-dihydroisobenzofuran-5-yloxy)phenyl]propane; 4,4'-(Isopropylidenediphenoxy)bis(phthalic anhydride); Bisphenol A diphthalic anhydride; BADPA; Bisphenol A dianhydride diphthalate; 5,5'-[Isopropylidenebis(4,1-phenyleneoxy)]diisobenzofuran-1,3-dione; 1,3-Isobenzofurandione, 5,5'-[isopropylidenebis(4,1-phenyleneoxy)]bis-
EINECS	Contact for details

Quality Control

Our 4,5'-[Isopropylidenebis[(4,1-Phenylene)Oxy]]Bis(Isobenzofuran-1,3-Dione) is manufactured under stringent quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the exacting requirements for polymer synthesis. Certificates of Analysis (COA) with detailed chromatographic and spectroscopic data are available upon request.

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 (moisture-sensitive) nature, the container must be kept sealed under dry conditions to prevent hydrolysis and maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 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.