2,2-Diphenylpropionic acid is primarily used in the pharmaceutical industry as a key intermediate in the synthesis of various drugs. It is particularly valuable in the production of nonsteroidal anti-inflammatory drugs (NSAIDs) due to its structural properties, which can help reduce inflammation and pain. Additionally, it serves as a building block in the development of other organic compounds, including those used in research and development for new therapeutic agents. Its applications also extend to the field of organic chemistry, where it is utilized in the preparation of esters and other derivatives for further chemical reactions.