(S)-2-Chloropentanedioic acid is primarily used in organic synthesis as a chiral building block for the preparation of various pharmaceuticals and fine chemicals. Its chiral nature makes it valuable in the development of enantiomerically pure compounds, which are crucial in drug design to ensure specificity and reduce side effects. It is also employed in the synthesis of intermediates for agrochemicals, where precise stereochemistry can enhance the efficacy and safety of the final product. Additionally, it finds application in research laboratories for studying stereochemical reactions and developing new synthetic methodologies.