Quinoline-4-carbohydrazide is primarily utilized in the field of medicinal chemistry due to its potential biological activities. It serves as a key intermediate in the synthesis of various pharmacologically active compounds. Researchers have explored its applications in developing antimicrobial, antifungal, and anticancer agents, as the quinoline core is known for its ability to interact with biological targets effectively. Additionally, it is used in the preparation of hydrazone derivatives, which are studied for their potential in treating diseases like tuberculosis and malaria. Its role in the development of new therapeutic agents makes it a valuable compound in drug discovery and pharmaceutical research.