(S)-(-)-N,N-Dimethyl-1-phenylethylamine is primarily used in organic synthesis as a chiral building block or intermediate. It is particularly valuable in the production of pharmaceuticals, where its chiral nature allows for the creation of enantiomerically pure compounds. This chemical is often employed in asymmetric synthesis to induce chirality in target molecules, enhancing the efficacy and specificity of drugs. Additionally, it finds application in the synthesis of agrochemicals and fine chemicals, where precise stereochemistry is crucial for desired biological activity. Its role as a resolving agent in separating racemic mixtures further highlights its importance in chemical research and development.