Used in the synthesis of pharmaceuticals and agrochemicals due to its aromatic amine functionality, which serves as a key building block in constructing biologically active molecules. Its fused ring system provides structural rigidity, making it valuable in the development of kinase inhibitors and other therapeutic agents. Also employed in materials science, particularly in the design of organic semiconductors and fluorescent dyes, where the extended π-system enhances electronic properties. Its amine group allows for easy functionalization, enabling use in cross-coupling reactions and the preparation of complex heterocyclic compounds.