Succinic acid monohydrazide HCl is primarily used in organic synthesis as a versatile building block for the preparation of various heterocyclic compounds. It serves as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of drugs targeting tuberculosis and other infectious diseases. Additionally, it is employed in the production of agrochemicals, where it acts as a precursor for herbicides and fungicides. Its hydrazide functional group makes it valuable in the creation of hydrazone derivatives, which are widely used in chemical research for their ability to form stable complexes with metal ions. This compound also finds application in the field of polymer chemistry, where it is utilized to modify polymers and enhance their properties.