Used primarily as an intermediate in organic synthesis, especially in the pharmaceutical industry. It plays a key role in the preparation of vasodilator drugs such as papaverine, which is used to treat blood vessel spasms and improve blood flow. Its reactivity allows it to form amide and ester derivatives, making it valuable for constructing complex bioactive molecules. Also employed in the synthesis of natural product analogs and in the development of new therapeutic agents where a trimethoxybenzoyl moiety is required. Its acyl chloride group readily participates in coupling reactions, enabling efficient bond formation with amines and alcohols under controlled conditions.