Description

4,4'-(Dimethylmethylene)Bis(1,4-Phenyleneoxy)Bis(Isobenzofuran-1,3-Dione) is a high-purity, specialized aromatic dianhydride monomer. This compound is critical 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

• Primary monomer for the synthesis of high-temperature, high-performance polyimide resins.
• Key intermediate in the production of advanced engineering plastics for aerospace components.
• Used in the formulation of heat-resistant adhesives and sealants.
• Essential for manufacturing flexible printed circuit boards (FPCBs) and electronic encapsulants.
• Component in the synthesis of specialty poly(amide-imide) coatings for wire and cable.
• Building block for liquid crystal polymers (LCPs) used in precision molded parts.
• Research and development of novel polymeric materials for microelectronics and optoelectronics.

Basic Information

Product Name	4,4'-(Dimethylmethylene)Bis(1,4-Phenyleneoxy)Bis(Isobenzofuran-1,3-Dione)
CAS No.	52256-80-1
Molecular Formula	C35H20O8
Molecular Weight	592.53 g/mol
Synonyms	Bis[4-(1,3-dioxo-1,3-dihydro-2-benzofuran-5-yloxy)phenyl]dimethylmethane; 5,5'-[Isopropylidenebis(p-phenyleneoxy)]diisobenzofuran-1,3-dione; Bisphenol A dianhydride derivative; BPADA analogue; Aromatic ether dianhydride; 4,4'-(4,4'-Isopropylidenediphenoxy)bis(phthalic anhydride); Dianhydride monomer for polyimides
EINECS	Contact for details

Quality Control

Our 4,4'-(Dimethylmethylene)Bis(1,4-Phenyleneoxy)Bis(Isobenzofuran-1,3-Dione) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for polymer synthesis. Certificates of Analysis (COA) detailing batch-specific results are provided to guarantee traceability and consistency for our global B2B clients.

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	≤ 10 ppm

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