Description

3,4'-Oxydiphthalic Anhydride is a high-purity aromatic dianhydride monomer essential for advanced polymer synthesis. This compound is valued for its ability to impart excellent thermal stability, mechanical strength, and chemical resistance to the resulting materials. It is a critical raw material for manufacturers in the electronics, aerospace, and high-performance plastics industries seeking to develop next-generation polyimides and other specialty polymers.

Application

• Polyimide Precursor: A key monomer for synthesizing high-temperature, high-strength polyimide resins and films.
• Epoxy Curing Agent: Used to cure epoxy resins, enhancing their thermal and mechanical properties for advanced composites.
• Electronic Materials: Employed in the production of dielectric layers, flexible printed circuits (FPC), and semiconductor encapsulation materials.
• High-Performance Coatings: Imparts durability and heat resistance to industrial and protective coatings.
• Adhesive Formulations: Used in high-temperature structural adhesives for aerospace and automotive applications.
• Advanced Composite Materials: Serves as a matrix resin component for carbon fiber and other fiber-reinforced composites.

Basic Information

Product Name	3,4'-Oxydiphthalic Anhydride
CAS No.	50662-95-8
Molecular Formula	C16H6O7
Molecular Weight	310.22 g/mol
Synonyms	3,4'-ODPA; 4,4'-Oxydiphthalic Anhydride (isomeric); 3,4'-Oxydiphthalic Acid Dianhydride; 1,1'-Biphenyl-3,4,4'-tricarboxylic Acid 3,4:4'-Dianhydride; Oxybis(4,1-phenylene)bis(1,3-dioxo-1,3-dihydroisobenzofuran-5-carboxylic acid) (IUPAC); ODPA (3,4' isomer); Bis(3,4-dicarboxyphenyl) Ether Dianhydride; Contact for additional names.
EINECS	256-673-3

Quality Control

Our 3,4'-Oxydiphthalic Anhydride is produced under a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the exacting standards required for high-performance polymer applications. A detailed Certificate of Analysis (COA) is provided with each shipment, guaranteeing traceability and consistent batch-to-batch quality.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 99.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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