Aminoacetonitrile hydrochloride is primarily used in organic synthesis as a building block for the preparation of various heterocyclic compounds. It serves as a key intermediate in the production of pharmaceuticals, particularly in the synthesis of antihypertensive agents and other bioactive molecules. Additionally, it is utilized in the development of agrochemicals, contributing to the creation of pesticides and herbicides. Its role in peptide synthesis is also notable, where it aids in the formation of peptide bonds, making it valuable in biochemical research and drug discovery.