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2,3,3',4'-Biphenyltetracarboxylic dianhydride (a-BPDA)

CAS Number 36978-41-3

Chemistry Building Blocks, Diamines and Dianhydrides, Heterocyclic Building Blocks, Materials, Monomers


Product Code B2131-LT-10g
Price £80 ex. VAT

A non-symmetrical biphenyl dianhydride

For the synthesis of polyimides in application of batteries, electrochromics, and high performance polymers


Specifications | MSDS | Literature and Reviews


2,3,3',4'-Biphenyltetracarboxylic dianhydride (a-BPDA, CAS number 36978-41-3), a derivative of biphenyl, has two phthalic anhydrides linked unsymmetrically at 3- and 4-position. The backbone of the polyimides synthesised from 2,3,3',4'-Biphenyltetracarboxylic dianhydride is twisted, leading to a suppression of intermolecular charge transfer. Thus, the polyimides are transparent and heat resistant. Diimides synthesized from a-BPDA and cyclohexylamine display long-lived luminescence up to 1.3 seconds after ultraviolet light irradiation.

2,3,3',4'-Biphenyltetracarboxylic dianhydride is also used to synthesize covalent organic frameworks(COFs) with low dielectric constant (2.72), low thermal expansion coefficient (62.2 ppm/K) and high breakdown strength (412.8 kV/mm). It is ideal for low signal loss electronic packaging. Lithium battery cathodes of the polyimides-decorated carbon nanotubes (CNTs) show a high capacity of 163 mAh/g at 0.05 A/g and a rate capability of 122 mAh/g at 5 A/g.

General Information


CAS Number 36978-41-3
Chemical Formula C16H6O6
Full Name 2,3,3',4'-Biphenyltetracarboxylic dianhydride
Molecular Weight 294.22 g/mol
Synonyms 3,4'-Biphthalic anhydride, 4,5'-Bi-2-benzofuran-1,1',3,3'-tetrone
Classification / Family Dianhydride building block, Polyimides, COFs, Batteries, High performance polymers, Electrochromics

Chemical Structure


2,3,3',4'-Biphenyltetracarboxylic dianhydride (a-BPDA) chemical structure, CAS 36978-41-3.
2,3,3',4'-Biphenyltetracarboxylic dianhydride (a-BPDA) chemical structure, CAS 36978-41-3

Product Details


Purity >99%
Melting Point Tm = 195 °C – 205 °C
Appearance White to off-white powder/crystal

MSDS Documentation


2,3,3',4'-Biphenyltetracarboxylic dianhydride (a-BPDA)2,3,3',4'-Biphenyltetracarboxylic dianhydride (a-BPDA) MSDS Sheet

Literature and Reviews


  1. Long-lived luminescence emitted from imide compounds dispersed in polymer matrices after continuous ultraviolet irradiation and its relation to oxygen quenching, M. Doi et al., ChemPhotoChem., e202200310(2023); DOI: 10.1002/cptc.202200310.
  2. Colorless, heat resistant polyimide films derived from 2,3,3′,4′-biphenyltetracarboxylic dianhydride, G. Song et al., IOP Conf. Series: Materials Science and Engineering, 733, 012035(2020); DOI: 10.1088/1757-899X/733/1/012035.
  3. Construction of all-organic low dielectric polyimide hybrids via synergistic effect between covalent organic framework and cross-linking structure, W. Zhao et al., Nano Mater. Sci., in press(2023); DOI: 10.1016/j.nanoms.2023.02.002.
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