2-Phenylmorpholine hydrochloride is primarily utilized in organic synthesis as a building block for the preparation of various pharmaceutical compounds. It serves as a key intermediate in the development of drugs targeting the central nervous system, particularly in the synthesis of compounds with potential analgesic or anti-inflammatory properties. Additionally, it is employed in the creation of ligands for receptor studies, aiding in the exploration of biochemical pathways and drug discovery. Its role in facilitating the production of complex molecules makes it valuable in medicinal chemistry and research applications.