Used in the synthesis of pharmaceutical intermediates, particularly in the development of indole-based compounds with biological activity. Serves as a key building block in agrochemicals for creating plant growth regulators and certain pesticide formulations. Employed in research settings to modify indole structures for studying receptor binding, especially in serotonin and melatonin analogs. Also utilized in the preparation of fluorescent probes for biochemical imaging due to its conjugated structure that supports light absorption and emission. Shows potential in coordination chemistry as a ligand for metal ions in catalytic systems.