Used in the synthesis of pharmaceuticals and biologically active compounds, particularly in the development of indole-based drugs. Serves as an intermediate in the production of serotonin and melatonin analogs due to its structural similarity to natural indole derivatives. Employed in research for designing new anti-inflammatory, antimicrobial, and anticancer agents. Also utilized in the preparation of fluorescent dyes and sensors owing to its conjugated aldehyde group and aromatic framework. Commonly applied in organic synthesis for constructing complex heterocyclic systems through condensation and cyclization reactions.