Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of isoquinoline-based compounds with potential biological activity. Its structure supports the creation of complex heterocyclic systems found in certain central nervous system agents and antimicrobial drugs. The chloro and methoxy functional groups allow for selective substitutions, enabling fine-tuning of molecular properties during drug design. Also explored in research settings for building blocks in organic synthesis and in the preparation of fluorescent probes due to the inherent rigidity and electronic properties of the isoquinoline core.