AureChem supply 2,3,3',4'-Biphenyltetracarboxylic dianhydride (α-BPDA), CAS 36978-41-3, is an asymmetric dianhydride monomer primarily used in organic synthesis to create high-performance polyimides and advanced polymer systems. Its enhanced properties, providing advantages like higher glass transition temperatures (high Tg), greater transparency, and improved heat resistance.