Description

3,3',4,4'-Benzophenonetetracarboxylic Dianhydride is a high-purity aromatic dianhydride monomer essential for advanced polymer synthesis. This compound serves as a critical building block for creating high-performance materials with exceptional thermal stability and mechanical properties. It is primarily sought after by manufacturers in the electronics, aerospace, and specialty plastics industries for producing polyimides, polyamide-imides, and other high-temperature polymers.

Application

• Polyimide Precursor: A key monomer for synthesizing high-performance, heat-resistant polyimide resins and films.
• Electronic Materials: Used in the production of dielectric layers, flexible printed circuit boards (FPCBs), and semiconductor coatings.
• Advanced Composites: Incorporated into matrix resins for aerospace and automotive composites requiring extreme thermal endurance.
• Adhesives & Coatings: Formulation of high-temperature adhesives, insulating varnishes, and protective coatings.
• Gas Separation Membranes: Manufacturing of polyimide-based membranes for industrial gas separation processes.
• Liquid Crystal Polymers (LCPs): Serves as a comonomer in the synthesis of certain high-modulus LCPs.

Basic Information

Product Name	3,3',4,4'-Benzophenonetetracarboxylic Dianhydride
CAS No.	2421-28-5
Molecular Formula	C17H6O7
Molecular Weight	322.23 g/mol
Synonyms	BTDA; Benzophenone-3,3',4,4'-tetracarboxylic dianhydride; 4,4'-Carbonyldiphthalic anhydride; 3,3',4,4'-Diphenylketonetetracarboxylic dianhydride; 3,3',4,4'-Benzophenone tetracarboxylic acid dianhydride; 4,4'-(Carbonylbis(1,2-phenylenecarbonyl))diphthalic anhydride; CAS 2421-28-5
EINECS	219-348-1

Quality Control

Our 3,3',4,4'-Benzophenonetetracarboxylic Dianhydride is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for polymer-grade applications. A comprehensive Certificate of Analysis (COA) detailing purity, melting point, and impurity profiles 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); containers must be kept sealed to prevent absorption of atmospheric moisture which can affect product performance.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 99.0%
Melting Point	220 - 225 °C
Loss on Drying	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 1.0%

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