2-(p-Tolyl)propionic acid, also known as 2-(4-methylphenyl)propanoic acid, is primarily used as a chiral intermediate in the synthesis of nonsteroidal anti-inflammatory drugs (NSAIDs), particularly arylpropionic acid derivatives similar to ibuprofen and other profens. It serves as a building block in pharmaceutical chemistry for developing enantiomerically pure anti-inflammatory agents, aiding in the optimization of drug efficacy, metabolic stability, and reduced side effects. Its aromatic structure with a para-methyl group makes it valuable for medicinal chemistry research and the production of analogs for treating conditions like arthritis.