Widely used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. It serves as a building block in the preparation of active pharmaceutical ingredients due to its reactive chlorine atom, which allows for further functionalization through cross-coupling reactions. Also employed in the production of agrochemicals and organic semiconductors, where its aromatic and heterocyclic structure contributes to electron-transport properties. Its stability and ease of modification make it valuable in medicinal chemistry research and the design of novel bioactive compounds.