Description

9H-Fluorene-2,7-Disulfonic Acid, 9,9-Bis(4-Aminophenyl)- is a specialized aromatic diamine derivative with a fluorene core, functionalized with sulfonic acid and primary amine groups. This unique bifunctional structure makes it a valuable high-performance monomer and building block for advanced polymeric materials. It is primarily sought by R&D and production teams in the specialty polymer, advanced electronics, and high-performance coating sectors. The compound's dual reactivity allows for the synthesis of novel polyimides, polyamides, and other thermally stable, functional polymers.

Application

• High-Performance Polymer Synthesis: A key monomer for producing advanced polyimides (PIs) and polyamides (PAs) with exceptional thermal stability and mechanical strength for aerospace and electronics.
• Electronic Materials: Used in the development of photoalignment layers, liquid crystal polymers (LCPs), and dielectric materials for flexible displays and printed circuit boards.
• Gas Separation Membranes: Serves as a building block for polymers used in selective gas separation membranes due to the introduction of sulfonic acid groups which can enhance permeability and selectivity.
• Ion-Exchange Resins & Proton Exchange Membranes: The sulfonic acid functionality makes it suitable for precursors in sulfonated polymers used in fuel cell applications (PEMFCs) and water purification.
• Crosslinking Agent & Curing Agent: Functions as a crosslinker for epoxy resins and other thermosetting polymers, improving heat resistance and chemical stability.
• Optical Materials & Dyes: Acts as an intermediate for synthesizing fluorescent dyes, optical brighteners, and photoresist materials.
• Adhesives & Advanced Coatings: Imparts high-temperature performance and adhesion properties in specialty adhesives and protective coatings for industrial applications.
• Research & Chemical Intermediate: Employed in academic and industrial R&D for creating novel conjugated molecules and metal-organic frameworks (MOFs).

Basic Information

Product Name	9H-Fluorene-2,7-Disulfonic Acid, 9,9-Bis(4-Aminophenyl)-
CAS No.	455944-24-8
Molecular Formula	C25H20N2O6S2
Molecular Weight	508.57 g/mol
Synonyms	9,9-Bis(4-aminophenyl)fluorene-2,7-disulfonic Acid; 2,7-Fluorenedisulfonic Acid, 9,9-Bis(4-aminophenyl)-; 4,4'-(9H-Fluorene-9,9-diyl)bis(benzenamine)-2,7-disulfonic Acid; 9,9-Bis(p-aminophenyl)fluorene-2,7-disulfonic Acid; BAPFDS; 9,9-Bis(4-aminophenyl)-9H-fluorene-2,7-disulfonic Acid; 2,7-Disulfo-9,9-bis(4-aminophenyl)fluorene
EINECS	Contact for details

Quality Control

Our production of 9H-Fluorene-2,7-Disulfonic Acid, 9,9-Bis(4-Aminophenyl)- adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for demanding applications. Each lot undergoes comprehensive analysis including HPLC for purity and impurity profiling, NMR for structural confirmation, and titration for functional group analysis. We provide detailed Certificates of Analysis (COA) with all shipments, documenting key specifications. Our quality system is designed to support R&D and scale-up processes, ensuring reliable performance in your synthesis workflows.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed and consideration should be given to storage under an inert atmosphere or with desiccant for long-term preservation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 2.0%
Sulfonic Acid Content (Titration)	Contact for details
Amino Group Content (Titration)	Contact for details
Residue on Ignition	≤ 0.5%

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