Ethyl 6-chloro-3-pyridazinecarboxylate is primarily utilized in the field of organic synthesis as a versatile intermediate. It plays a significant role in the development of pharmaceuticals, particularly in the synthesis of compounds with potential biological activity. The compound is often employed in the construction of pyridazine derivatives, which are key structures in various drugs targeting neurological and cardiovascular diseases. Additionally, it serves as a building block in agrochemical research for creating novel pesticides and herbicides, owing to its reactive chloro and ester functional groups that allow for further chemical modifications. Its application extends to material science, where it is used in the synthesis of specialty chemicals and advanced materials.