Used as an intermediate in the synthesis of pharmaceuticals, particularly in the production of antihypertensive drugs and other biologically active compounds. It serves as a building block in organic reactions, especially in the development of thiophene-based derivatives for use in agrochemicals and dyes. Its aldehyde functional group allows for easy modification, making it valuable in the preparation of ligands for catalysis and in the fabrication of conductive polymers for electronic materials. Also employed in the manufacture of specialty chemicals requiring aromatic heterocyclic structures with sulfur functionality.