9,9-Bis(4-aminophenyl)fluorene (BAFL) CAS 15499-84-0

Name: 9,9-Bis(4-aminophenyl)fluorene (BAFL) CAS 15499-84-0
Brand: Aure Chemical
Price: 1.00 USD
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Synonyms: 4,4'-(9-Fluorenylidene)dianiline; 4,4'-(9H-fluorene-9,9-diyl)dianilinel; FDA; 9,9'-Bis(4-aminophenyl)fluorene

Shandong Aure Chemical Co., Ltd. is one of the leading suppliers of BAFL in China and also one of the manufacturers of this product.

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Product Details

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9,9-Bis(4-aminophenyl)fluorene, CAS 15499-84-0, also known as 4,4'-(9-Fluorenylidene)dianiline or BAFL, is a rigid, fluorene-derived diamine monomer with partial conjugation and high thermal stability (melting point 237–239°C, Td5% up to 530°C). Its molecular structure is commonly discussed within the broader category of aromatic polyimide diamine monomers , enabling the synthesis of advanced polymers with enhanced mechanical strength, transparency, and resistance to heat and hydrolysis.

Basic Information of BAFL

Product Name	9,9-Bis(4-aminophenyl)fluorene
Abbreviation	BAFL / FDA
CAS Number	15499-84-0
Molecular Formula	C25H20N2
Molecular Weight	348.44 g/mol
Appearance	White to almost white powder to crystalline
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular Structure

Key Properties

Excellent thermal and oxidative stability
Rigid molecular structure contributing to mechanical reinforcement
Good optical transparency in derived polymer systems
Low dielectric behavior relevant to electronic material formulations
Compatibility with various dianhydrides for polyimide synthesis

Application Contexts of BAFL

High-Performance Polyimides: BAFL is used as a structural diamine component in polyimide systems discussed in high-temperature and aerospace-oriented polyimide materials , where rigid aromatic backbones are commonly evaluated for thermal endurance.
Electronic and Dielectric Materials: Its low dielectric characteristics are relevant in polymer formulations referenced in electronics and semiconductor polyimide applications , without implying end-device suitability.
Optical and Transparent Polymer Systems: The fluorene-based structure is frequently cited in discussions of transparent and optically relevant polyimide materials , particularly where rigidity and clarity are design considerations.

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