Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and fine chemicals. Its aldehyde and chloro functionalities allow for diverse chemical transformations, such as cross-coupling reactions and nucleophilic substitutions. Commonly employed in the development of bioactive molecules, including potential therapeutic agents targeting central nervous system disorders and anti-inflammatory compounds. Also utilized in the synthesis of fluorescent dyes and polymers due to its aromatic backbone and reactivity profile.