2,3,3',4'-BiphenyLtetracarboxylic dianhydride (α-BPDA) CAS 36978-41-3

Synonyms: 3,4'-Biphthalic anhydride; 4,5'-Bi(1,3-isobenzofurandione); 2,3,3',4'-Biphenyltetracarboxylic acid dianhydride; 2,3,3,4-biphenyl tetracarboxylic dianhydride

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Product Details

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2,3,3',4'-Biphenyltetracarboxylic dianhydride (α-BPDA), CAS 36978-41-3, is an asymmetric dianhydride primarily used as a monomer in organic synthesis for high-performance polymers. Its non-symmetrical structure contributes to materials with enhanced properties like higher glass transition temperatures, transparency, and heat resistance compared to symmetric analogs.

Basic Information ofα-BPDA

Product Name	2,3,3',4'-BiphenyLtetracarboxylic dianhydride
Abbreviation	α-BPDA
CAS Number	36978-41-3
Molecular Formula	C16H6O6
Molecular Weight	294.22 g/mol
Appearance	White to almost white powder to crystal
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular formula

Key Properties

Unsymmetrical structure leads to suppressed intermolecular charge transfer, enhancing transparency in resultant polyimides
Higher Tg and lower melt viscosity than symmetric BPDA isomer, improving processability
Good thermal stability, mechanical strength, and chemical resistance
Used to build transparent, high-performance dielectric films, COFs, and polymer networks
Dual anhydride groups enable polymerization with diamines producing high molecular weight polyimides

Key Applications of α-BPDA

Polyimide Synthesis: Employed to produce polyimides with excellent thermal stability, mechanical strength, chemical resistance, solvent resistance, radiation resistance, and dielectric properties. These are applied in batteries (e.g., lithium-ion cathodes with high capacity of 163 mAh/g and rate capability of 122 mAh/g), electrochromics, and high-performance polymers for electronic materials.

Polyesters and Ester Polymers: Used in creating resins for plastics, textiles, and coatings, leveraging its role in imparting durability and resistance.

Covalent Organic Frameworks (COFs): Facilitates low-dielectric materials (constant of 2.72) with low thermal expansion (62.2 ppm/K) and high breakdown strength (412.8 kV/mm), suitable for low-signal-loss electronic packaging in industries like semiconductors and telecommunications.

Luminescent Materials: Forms diimides (e.g., with cyclohexylamine) exhibiting long-lived luminescence up to 1.3 seconds after UV exposure, with potential in optical technologies and sensors

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