[1,1′-Biphenyl]-4,4′-dicarboxamide (CAS 46902-08-3) has a molecular formula of C??H??N?O? and a molecular weight of 240.26 g/mol, with carboxamide groups (-CONH?) attached to the 4,4′-positions of the biphenyl core. As a symmetric aromatic dicarboxamide, it is widely used as an intermediate in synthesizing high-performance polymers (e.g., polyamides) and coordination ligands. It requires sealed, cool, dry storage to avoid moisture absorption or amide hydrolysis, ensuring structural stability and reactivity for material science and synthetic applications.