2-(3-Ethylphenyl)acetic acid is primarily used in the synthesis of various pharmaceutical compounds. It serves as a key intermediate in the production of nonsteroidal anti-inflammatory drugs (NSAIDs), which are widely used to reduce pain, inflammation, and fever. Additionally, this chemical is utilized in the development of active pharmaceutical ingredients (APIs) for treating conditions such as arthritis and other inflammatory disorders. Its role in organic synthesis also extends to the creation of fine chemicals and specialty compounds for research and industrial applications.