3-(4-Methoxyphenyl)propionic acid, also known as ibuprofen, is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to relieve pain, reduce inflammation, and lower fever. It is a white crystalline powder with a molecular formula C13H18O2 and a molecular weight of 206.28 g/mol. This compound is widely utilized in the pharmaceutical industry for its analgesic, anti-inflammatory, and antipyretic properties.