Description

Bis[(3,4-Dicarboxylic Anhydride) Phenyl]Terephthalate is a high-purity aromatic dianhydride monomer, a critical building block for advanced polymer synthesis. Its value lies in its ability to impart exceptional thermal stability, mechanical strength, and chemical resistance to the resulting materials. This compound is essential for manufacturers in the electronics, aerospace, and specialty coatings industries seeking to develop high-performance polyimides and other high-temperature polymers.

Application

• Polyimide Synthesis: Primary monomer for the production of high-performance, thermally stable polyimide resins and films.
• Advanced Composites: Key component in the formulation of matrix resins for carbon fiber and other high-strength composites used in aerospace and automotive applications.
• Electronic Materials: Used in the manufacture of dielectric layers, flexible printed circuit boards (FPCBs), and passivation coatings for semiconductors.
• Specialty Adhesives & Coatings: Imparts heat resistance and durability to high-temperature adhesives, wire enamels, and protective coatings.
• Gas Separation Membranes: A precursor for polymers used in selective gas separation membranes due to its rigid molecular structure.
• Liquid Crystal Polymers (LCPs): Serves as a monomeric unit in the synthesis of high-modulus LCPs for precision molded components.

Basic Information

Product Name	Bis[(3,4-Dicarboxylic Anhydride) Phenyl]Terephthalate
CAS No.	21117-79-3
Molecular Formula	C30H14O10
Molecular Weight	534.43 g/mol
Synonyms	1,4-Bis[4-(3,4-dicarboxyphenoxy)phenyl] terephthalate dianhydride; 4,4'-Bis(3,4-dicarboxyphenoxy)diphenyl terephthalate dianhydride; BPTPA; BDPT dianhydride; 4,4'-(Terephthaloyldioxy)diphthalic anhydride; 1,1'-[1,4-Phenylenebis(oxy-4,1-phenylene)]bis[1,3-dihydro-1,3-dioxoisobenzofuran-5-carboxylic acid] dianhydride
EINECS	Contact for details

Quality Control

Our Bis[(3,4-Dicarboxylic Anhydride) Phenyl]Terephthalate 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 advanced polymer applications. A comprehensive Certificate of Analysis (COA) detailing purity, anhydride content, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 a dry inert atmosphere (e.g., nitrogen or argon) after opening to prevent hydrolysis of the anhydride groups.

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.5%
Melting Point	285 - 295 °C
Anhydride Equivalent Weight	267 - 269 g/eq
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.