Used in the synthesis of pharmaceutical intermediates, particularly in the production of nitrogen mustard derivatives for cancer treatment. Acts as a building block in alkylating agents due to the presence of the chloroethyl group, which can form reactive aziridinium ions that bind to DNA. Also utilized in the development of cholinergic agents and other bioactive molecules where a functionalized ethanolamine scaffold is required. Its hydrochloride salt form enhances stability and solubility in aqueous reaction systems.