Aminourea hydrochloride is widely used in organic synthesis as a versatile reagent. It plays a crucial role in the preparation of heterocyclic compounds, particularly in the synthesis of pyrazoles and triazoles, which are important in pharmaceutical and agrochemical industries. The compound is also employed as a reducing agent in certain chemical reactions, facilitating the conversion of nitro groups to amines. Additionally, it finds application in the field of biochemistry, where it is used to study enzyme inhibition and protein modification. Its ability to act as a nucleophile makes it valuable in the development of various biologically active molecules.