FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Product Code B2181-LT-2g
Price £90 ex. VAT

A fluorinated biphenyl diamine

As an intermediate for polyimides synthesis in application of high-performance polymers, flexible displays, and gas permeable membranes

Specifications | MSDS | Literature and Reviews

N,N'-(2,2'-bis(trifluoromethyl)-[1,1'-biphenyl]-4,4'-diyl)bis(4-aminobenzamide), CAS number 1449757-11-2, commonly known as AB-TFMB, has two anilines connecting to a trifluoromethyl biphenyl core through two carboxamides. AB-TFMB is used to synthesize polyimides with high transparency and low linear coefficient of thermal expansion (CTE) which are ideal for flexible displays. The transparency is brought by the trifluoromethyl substituents hindering the intermolecular charge transfer. The low CTE (4.2 ppm/K) is achieved by the linear and rigid structure of AB-TFMB.

The AB-TFMB based polyimides are also gas permeable with O2-transmission rate up to 2313 cm3/m2/day at 23 °C and 1.01 bar.

Multiple functional groups

Multiple functional groups

For facile synthesis

Fluorinated building block

Fluorinated diamine building block

For drug discovery, COFs, and polyamides

Worldwide shipping for 1449757-11-2

Worldwide shipping

Quick and reliable shipping

High purity 1449757-11-2

High purity

>99% High purity

General Information

CAS Number 1449757-11-2
Chemical Formula C28H20F6N4O2
Full Name N,N'-(2,2'-bis(trifluoromethyl)-[1,1'-biphenyl]-4,4'-diyl)bis(4-aminobenzamide)
Molecular Weight 558.47 g/mol
Synonyms N/A
Classification / Family Fluorinated building block, Diamine building block, High performance polymers, Displays, Membranes

Chemical Structure

AB-TFMB chemical structure, CAS 1449757-11-2
AB-TFMB chemical structure, CAS 1449757-11-2

Product Details

Purity >99%
Melting Point Not Known
Appearance White powder/crystal

MSDS Documentation


Literature and Reviews

  1. Colourless and transparent copolyimides and their nanocomposites: thermo-optical properties, morphologies, and gas permeabilities, H. Shin et al., Polymers, 11, 585(2019); DOI: 10.3390/polym11040585.
  2. Development of solution-processable, optically transparent polyimides with ultra-low linear coefficients of thermal expansion, M. Hasegawa, Polymers, 9, 520(2017); DOI: 10.3390/polym9100520.
  3. Low-CTE polyimides derived from 2,3,6,7-naphthalenetetracarboxylic dianhydride, M. Hasegawa et al., Polym. J., 39(6), 610-621(2007); DOI: 10.1295/polymj.PJ2006234.
Return to the top