Description

4,4'-(3,4-Dicarboxyphenoxy)Diphenylsulfide Dianhydride is a high-purity aromatic dianhydride monomer, a critical building block for advanced polymer synthesis. Its unique molecular structure, featuring both sulfide and ether linkages, enables the production of high-performance polymers with exceptional thermal stability and mechanical properties. This compound is essential for R&D and manufacturing in sectors requiring specialty polyimides and other high-temperature engineering plastics.

Application

• Polyimide Synthesis: A key monomer for producing high-performance, heat-resistant polyimide resins and films.
• Advanced Composites: Used in the formulation of matrix resins for aerospace and automotive composite materials.
• Electronic Materials: Integral in the manufacture of dielectric layers, flexible printed circuit boards (FPCBs), and semiconductor encapsulation materials.
• High-Temperature Adhesives & Coatings: Serves as a precursor for adhesives and protective coatings that must withstand extreme environments.
• Gas Separation Membranes: Used in the development of polymeric membranes for selective gas separation processes.
• Academic & Industrial R&D: A valuable intermediate for researchers developing novel polymers with tailored properties.

Basic Information

Product Name	4,4'-(3,4-Dicarboxyphenoxy)Diphenylsulfide Dianhydride
CAS No.	52256-85-6
Molecular Formula	C28H14O8S
Molecular Weight	510.47 g/mol
Synonyms	4,4'-(3,4-Dicarboxyphenoxy)diphenyl sulfide dianhydride; 4,4'-Oxydi(phthalic anhydride) sulfide derivative; Bisphenol S dianhydride derivative; 4,4'-Sulfonylbis(phthalic anhydride) ether derivative; 4-(3,4-Dicarboxyphenoxy)phenyl sulfide dianhydride; Dianhydride of 4,4'-(3,4-dicarboxyphenoxy)diphenyl sulfide; HQDEA; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our 4,4'-(3,4-Dicarboxyphenoxy)Diphenylsulfide Dianhydride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for polymer-grade applications. A comprehensive Certificate of Analysis (COA) detailing purity, moisture content, and other critical parameters is provided with every shipment to guarantee consistency and reliability for your synthesis processes.

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 nature, the container must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) after initial opening to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.5%
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.