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 info@ossila.com, 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 B2121-LT-10g
Price $113 ex. VAT

Quality assured

Expert support

Volume discounts

Worldwide shipping

Fast and secure


A diphenylamine with a biphenyl esters linker

As the intermediate for polyimides and imine synthesis in application of high performance polymers and sensors


4,4'-Bis(3-aminophenoxy)biphenyl (43BAPOBP) has a biphenyl linker capped with two 3-aminophenoxy groups. 4,4'-Bis(3-aminophenoxy)biphenyl is typically use as a precursor for polyimides which have high chemical and thermal resistance. The polyimides are ideal for polymer matrices due to its high miscibility induced by intermolecular charge transfer. A shape memory film fabricated from the polyimides can recover to its original flat shape from temporary spiral shape on hot plate set at 240 °C. This is promising in the field of thermal actuators.

43BAPOBP can reacts with aldehyde to form imines. A fluorescence thin film developed from the imines has the ability to detect (sensitivity of 150 ppb – 1.5 ppm) and remove hydrogen chloride (187.5 w/w%) and ammonia (37.5 w/w%).

General Information

CAS Number 105112-76-3
Chemical Formula C24H20N2O2
Full Name 4,4'-Bis(3-aminophenoxy)biphenyl
Molecular Weight 368.44 g/mol
Synonyms 3,3'-[[1,1'-Biphenyl]-4,4'-diylbis(oxy)]dianiline, 3,3'-[4,4'-Biphenyldiylbis(oxy)]dianiline
Classification / Family Diamine building block, Polyimides, Sensors, High performance polymers

Chemical Structure

4,4'-Bis(3-aminophenoxy)biphenyl (43BAPOBP) chemical structure, CAS 105112-76-3.
4,4'-Bis(3-aminophenoxy)biphenyl (43BAPOBP) chemical structure, CAS 105112-76-3

Product Details

Purity >99%
Melting Point Tm = 147 °C
Appearance White to reddish yellow powder/crystal

MSDS Documentation

4,4'-Bis(3-aminophenoxy)biphenyl (43BAPOBP)4,4'-Bis(3-aminophenoxy)biphenyl (43BAPOBP) MSDS Sheet

Literature and Reviews

  1. Preparation and characterization of polyimide/TiO2 nano-composites for non-lethal weapon, X. Cui, Journal of Physics: Conference Series, 1759, 012005(2021); DOI: 10.1088/1742-6596/1759/1/012005.
  2. High cycle-life shape memory polymer at high temperature, D. Kong et al., Sci. Rep., 6, 33610 (2016). DOI: 10.1038/srep33610.
  3. Dielectric elastomers with dual piezo-electrostatic response optimized through chemical design for electromechanical transducers, C. Tugui et al., J. Mater. Chem. C, 5, 824(2017); DOI: 10.1039/c6tc05193f.
  4. Imine bond-based fluorescent nanofilms toward high-performance detection and efficient removal of HCl and NH3, M. Li et al., Anal. Chem., 95(3), 2094–2101(2023); DOI: 10.1021/acs.analchem.2c05059.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

Return to the top