Used primarily as an intermediate in the synthesis of pharmaceuticals and agrochemicals. Its structure allows for selective substitution reactions, making it valuable in constructing complex heterocyclic systems. It is also employed in the development of bioactive molecules, including antimicrobial and antifungal agents. Due to the presence of multiple chlorine atoms, it serves as a building block for cross-coupling reactions in medicinal chemistry research. Additionally, it finds use in the preparation of dyes and functional materials where halogenated isoquinoline frameworks are required.