Cinchonidine sulfate dihydrate is primarily used in the pharmaceutical industry as a chiral resolving agent. It plays a crucial role in the separation of enantiomers, particularly in the synthesis of optically active compounds. This chemical is also employed in asymmetric catalysis, aiding in the production of specific stereoisomers that are essential for the development of certain drugs. Additionally, it finds application in research laboratories for studying stereochemistry and developing new synthetic methodologies. Its ability to induce chirality makes it valuable in creating compounds with high enantiomeric purity, which is critical for the efficacy and safety of many pharmaceuticals.