(3S,4S)-4-Fluoropyrrolidin-3-ol hydrochloride is primarily used in pharmaceutical research and development as a chiral building block. Its unique stereochemistry and fluorine substitution make it valuable in the synthesis of biologically active molecules, particularly in the design of drugs targeting the central nervous system. The compound is often utilized in the preparation of potential therapeutic agents, including those for neurological disorders, due to its ability to influence receptor binding and metabolic stability. Additionally, it serves as a key intermediate in the production of enantiomerically pure compounds, enhancing the efficacy and specificity of drug candidates.