2,2′-Bis(trifluoromethyl)benzidine (TFMB/TFDB)

Basic Information of TFMB / TFDB

Product Name	2,2'-Bis(trifluoromethyl)benzidine
Abbreviation	TFMB, TFDB
CAS Number	341-58-2
Product Type	Fluorinated aromatic diamine monomer
Molecular Formula	C14H10F6N2
Molecular Weight	320.23 g/mol
Appearance	White powder
Purity	≥ 99.9%
Metal Testing	Single metal ≤ 1 ppb
Main Application	Transparent, low-dielectric and high-performance 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 TFMB / TFDB

The above data is based on an available batch COA for TFMB / TFDB CAS 341-58-2. Final specifications, batch data and documentation should be confirmed by the latest COA before order confirmation.

Key Features in Polyimide Design

• Fluorinated aromatic diamine structure, relevant to fluorinated polyimide diamine applications.

• Bulky trifluoromethyl groups may help reduce intermolecular charge-transfer interactions and support optical clarity depending on the paired dianhydride and polymer design.

• Low-polarizability fluorinated groups are often considered in semiconductor and electronic polyimide applications.

• Rigid aromatic structure may support thermal stability in high-temperature polyimide applications.

• High-purity and low-metal-control requirements may be important for advanced polyimide materials used in electronic, optical and specialty polymer systems.

Pairing TFMB with Dianhydride Monomers

In polyimide synthesis, TFMB / TFDB is commonly evaluated together with selected polyimide dianhydride monomers. Fluorinated dianhydrides such as 6FDA CAS 1107-00-2 are often considered when transparent, low-dielectric or low-moisture-uptake PI systems are required.

Rigid aromatic dianhydrides such as BPDA or BTDA may be considered for high-temperature and dimensionally stable polyimide designs, while ether-containing dianhydrides such as ODPA may support processability and film-forming behavior. Final material performance depends on the complete monomer pair, formulation, purity level and processing conditions.

Application Context of TFMB in Polyimide Systems

TFMB is commonly referenced in material development involving transparent, low-dielectric and high-performance polyimides. Its role is typically that of a structural monomer rather than a finished application material, and final material performance depends on the paired dianhydride, formulation, processing and imidization conditions.

• Fluorinated polyimide diamine applications – monomer selection for fluorinated PI systems.

• Transparent polyimide material applications – optical clarity and reduced coloration in PI design.

• Semiconductor and electronic polyimide applications – low-dielectric and insulation-related material requirements.

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

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

• 6FDA CAS 1107-00-2 – fluorinated dianhydride often considered with TFMB in transparent and low-dielectric PI systems.

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

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

COA, SDS and Technical Documentation

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