Used in organic electronics as a building block for synthesizing conjugated polymers and small molecules in organic light-emitting diodes (OLEDs). Serves as an intermediate in the production of dyes, pharmaceuticals, and photovoltaic materials. Its aldehyde group allows for easy functionalization, enabling the development of sensors and fluorescent probes. Also employed in the synthesis of carbazole-based derivatives with biological activity, including antitumor and antimicrobial agents.