Used primarily as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of beta-blockers and other cardiovascular drugs. Its structure allows for the introduction of specific functional groups needed in active pharmaceutical ingredients. Commonly employed in organic synthesis due to its reactive chloromethyl and amine groups, facilitating coupling reactions and ring formations. Also utilized in the development of selective adrenergic receptor antagonists. Its hydrochloride salt form enhances stability and solubility, making it suitable for use in aqueous reaction environments.