Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the production of non-steroidal anti-inflammatory drugs (NSAIDs) such as diclofenac. It serves as a building block in organic synthesis due to the presence of reactive functional groups—the aldehyde and phenolic hydroxyl—which allow for further chemical modifications. Also employed in the development of agrochemicals and dyes, where its aromatic structure and chlorine substituents contribute to desired biological or optical properties. Its selective substitution pattern makes it valuable in creating compounds with specific steric and electronic characteristics.