(-)-8-Phenylmenthol is widely used as a chiral auxiliary in organic synthesis. It is particularly effective in asymmetric synthesis, where it helps induce chirality in various chemical reactions, such as Diels-Alder reactions, Michael additions, and alkylations. Its sterically demanding structure allows for high enantioselectivity, making it valuable for producing optically active compounds. Additionally, it is employed in the synthesis of natural products and pharmaceuticals, where precise stereochemistry is crucial. Its application extends to the preparation of enantiomerically pure intermediates, which are essential in drug development and fine chemical manufacturing.