Description

4,4'-Oxydiphthalic Anhydride is a high-purity aromatic dianhydride monomer essential for the synthesis of advanced polymeric materials. Its rigid, symmetrical structure is critical for imparting exceptional thermal stability, mechanical strength, and chemical resistance to the final polymers. This compound is a key 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 Synthesis: Primary monomer for producing high-temperature, high-strength polyimide resins and films.
• Advanced Composites: Used in matrices for carbon fiber and other composite materials in aerospace and automotive applications.
• Electronic Materials: Key component in dielectric layers, flexible printed circuit boards (FPCBs), and semiconductor encapsulation materials.
• High-Performance Coatings: Imparts heat resistance and durability to wire enamels, protective coatings, and adhesives.
• Gas Separation Membranes: Used in the manufacture of polyimide membranes for industrial gas separation processes.
• Liquid Crystal Polymers (LCPs): Serves as a comonomer in the production of high-performance LCPs for connectors and precision components.

Basic Information

Product Name	4,4'-Oxydiphthalic Anhydride
CAS No.	1823-59-2
Molecular Formula	C16H6O7
Molecular Weight	310.22 g/mol
Synonyms	4,4'-Oxydiphthalic Anhydride; ODPA; 4,4'-Oxydibenzoic Anhydride; 4,4'-Oxydiphthalic Acid Dianhydride; 4,4'-Oxydi(1,2-benzenedicarboxylic) Dianhydride; 4,4'-Oxydiphthalic Acid Anhydride; 4,4'-Oxydiphthalic Dianhydride; Bis(3,4-dicarboxyphenyl) Ether Dianhydride
EINECS	217-352-4

Quality Control

Our 4,4'-Oxydiphthalic Anhydride is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, impurity profile analysis, and physical property verification, to meet the stringent requirements of polymer synthesis. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under dry, inert conditions (e.g., nitrogen or argon atmosphere) to prevent hydrolysis and maintain purity. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0%
Melting Point	225 - 230 °C
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm

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