Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of antitubercular and antimicrobial agents. It serves as a building block for heterocyclic compounds due to its reactive hydrazine and pyridine groups. Commonly employed in the preparation of pyridopyrimidines and other fused ring systems with biological activity. Also utilized in agrochemical research for developing novel pesticides and herbicides. Its ability to form hydrazone derivatives makes it valuable in medicinal chemistry for structure-activity relationship studies.