9,9-Bis(4-aminophenyl)fluorene (BAFL)

Basic Information of BAFL

Product Name	9,9-Bis(4-aminophenyl)fluorene
Synonym	4,4'-(9-Fluorenylidene)dianiline
Abbreviation	BAFL / FDA
CAS Number	15499-84-0
Product Type	Fluorene-based aromatic diamine monomer
Molecular Formula	C25H20N2
Molecular Weight	348.44 g/mol
Appearance	White to almost white powder or crystal
Purity	≥ 99%; final batch data should be confirmed by latest COA
Main Application	High-Tg, heat-resistant, optical and specialty polyimide synthesis
Package	1 kg/bottle, 20 kg/drum, or customized packaging
Documents	COA, SDS and TDS available upon request
Molecular Structure

Typical Specification of BAFL

The above information is provided as a typical specification reference for BAFL CAS 15499-84-0. Final batch data, purity, appearance and documentation should be confirmed by the latest COA before order confirmation.

Key Features in Polyimide Design

• Rigid fluorene-based aromatic diamine structure, relevant to high-performance polyimide diamine monomers.

• Bulky fluorene core may support chain rigidity, thermal resistance and dimensional stability depending on the paired dianhydride and polymer architecture.

• Aromatic diamine functionality makes BAFL suitable for evaluation with selected dianhydride monomers in high-performance PI synthesis.

• BAFL can be considered in optical and transparent polyimide applications where polymer rigidity and optical behavior are part of the material design.

• Final material properties depend on monomer purity, dianhydride selection, solvent system, imidization conditions and polymer processing method.

Pairing BAFL with Dianhydride Monomers

In polyimide synthesis, BAFL may be evaluated with selected polyimide dianhydride monomers to design rigid, heat-resistant and specialty PI systems. Rigid aromatic dianhydrides such as BPDA CAS 2420-87-3 or BTDA CAS 2421-28-5 may support thermal resistance and dimensional stability.

Fluorinated dianhydrides such as 6FDA CAS 1107-00-2 may be considered when optical, dielectric or moisture-related properties are part of the target design, while ether-containing dianhydrides such as ODPA CAS 1823-59-2 may help adjust processability and film-forming behavior.

Application Context of BAFL in Polyimide Systems

BAFL is typically used as a structural diamine monomer rather than a finished application material. It is commonly discussed in rigid, heat-resistant, optical and electronic polyimide material development, where fluorene-based molecular structure can influence polymer performance.

• High-temperature polyimide applications – thermal resistance and high-performance polymer environments.

• Electronics and semiconductor polyimide applications – dielectric, insulation and thermally stable material requirements.

• Optical and transparent polyimide applications – optical clarity, reduced coloration and polymer structure considerations.

• Specialty functional polyimide development – rigid fluorene-based diamine selection for advanced polymer research.

Related Polyimide Monomer Supply Guides

For a broader technical overview of both diamine and dianhydride monomer families, please review Polyimide Monomers: Diamines and Dianhydrides.

Related Polyimide Monomers

• FFDA CAS 127926-65-2 – fluorinated fluorene-based diamine for optical and high-performance PI material design.

• BAPP CAS 13080-86-9 – ether-containing aromatic diamine for processable and heat-resistant polyimide systems.

• BPDA CAS 2420-87-3 – rigid aromatic dianhydride for low-CTE and high-temperature PI films.

COA, SDS and Technical Documentation

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