2,2'-Binaphthalene-6,6'-dicarboxylic acid is a rigid, axially chiral dicarboxylic acid derivative based on a binaphthyl scaffold. Its structure features two carboxylic acid groups at the 6,6'-positions of the binaphthyl core, which can be readily converted into esters, amides, or other functional groups. The binaphthyl backbone provides inherent chirality and a large, conjugated π-system, making it a valuable building block for constructing advanced functional materials. This compound is primarily utilized as a key precursor in the synthesis of organic electronic materials. Its rigid and extended aromatic structure is advantageous for creating organic light-emitting diodes (OLEDs), particularly for host or emitting layer materials. The carboxylic acid groups serve as convenient handles for further functionalization and polymerization, enabling the construction of polymers or small molecules with tailored electronic properties, such as charge transport or luminescence characteristics. Beyond its role in optoelectronics, it serves as a sophisticated chiral ligand precursor in asymmetric catalysis and as a monomer for chiral porous organic polymers. Its applications leverage the combination of chirality, rigidity, and synthetic versatility offered by the functionalized binaphthyl framework.