p-Tolyl sulfoxide is primarily used in organic synthesis as an intermediate or reagent in various chemical reactions. It is particularly valuable in the preparation of pharmaceuticals and agrochemicals due to its ability to act as a building block for more complex molecules. The compound is also employed in asymmetric synthesis, where it serves as a chiral auxiliary to induce stereoselectivity in the formation of specific enantiomers. Additionally, p-Tolyl sulfoxide finds application in the development of ligands for catalytic processes, enhancing the efficiency and selectivity of metal-catalyzed reactions. Its role in the synthesis of sulfoxides and sulfones further extends its utility in material science and polymer chemistry.