Description

9,9-Bis(3,4-Dicarboxyphenyl)Fluorene Dianhydride is a high-purity, specialized aromatic dianhydride monomer essential for advanced polymer synthesis. This compound serves as a critical building block for creating high-performance polyimides and polyamide-imides, materials prized for their exceptional thermal stability and mechanical properties. It is primarily sought by manufacturers in the electronics, aerospace, and specialty coatings industries for developing next-generation insulating films, adhesives, and composite matrices.

Application

• High-Temperature Polyimide Synthesis: A key monomer for producing polyimide resins and films used in flexible printed circuits (FPCs) and chip packaging.
• Advanced Composite Materials: Used in the formulation of polyamide-imide (PAI) resins for aerospace components and automotive parts requiring extreme heat resistance.
• Electronic Encapsulants & Adhesives: Employed in the development of high-reliability, thermally stable encapsulating materials and adhesives for semiconductor devices.
• Gas Separation Membranes: Serves as a precursor for polyimides used in selective gas separation membranes for industrial processes.
• Specialty Coatings: Formulated into high-performance coatings for wires, fibers, and metal substrates that demand excellent dielectric strength and thermal endurance.
• Optical Materials Research: Investigated as a monomer for optically transparent polyimides used in display technologies and optical waveguides.

Basic Information

Product Name	9,9-Bis(3,4-Dicarboxyphenyl)Fluorene Dianhydride
CAS No.	135876-30-1
Molecular Formula	C35H18O8
Molecular Weight	590.52 g/mol
Synonyms	9,9-Bis(3,4-Dicarboxyphenyl)fluorene-2,7-dianhydride; 4,4'-(9-Fluorenylidene)diphthalic anhydride; BAHF; 9,9-Bis(4-(3,4-dicarboxyphenyl))fluorene dianhydride; 2,2'-Bis(3,4-dicarboxyphenyl)-9,9'-bifluorenyl dianhydride (isomer); 4,4'-(9H-Fluorene-9,9-diyl)bis(1,2-benzenedicarboxylic acid) dianhydride; BFDA (common abbreviation); Fluorene-based dianhydride monomer
EINECS	Contact for details

Quality Control

Our 9,9-Bis(3,4-Dicarboxyphenyl)Fluorene 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 the high standards required for advanced polymer applications. Certificates of Analysis (COA) detailing batch-specific results are provided and can be tailored to meet specific customer requirements.

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

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Identification (IR)	Conforms to reference spectrum
Purity (HPLC)	≥ 98.5%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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