Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical industry. It serves as a building block for the preparation of active pharmaceutical ingredients (APIs) due to its ability to introduce acyl chloride and dimethylamino functional groups into target molecules. Commonly employed in the synthesis of analgesics, anti-inflammatory agents, and other bioactive compounds. Its reactivity allows for efficient coupling with amines and alcohols, making it valuable in the development of amides and esters in drug discovery. Also utilized in the production of dyes and functional materials where aromatic carbonyl derivatives are required.