Used in organic synthesis as an intermediate for pharmaceuticals and bioactive compounds. Serves as a building block in the preparation of indole-based drugs, including potential antitumor, antiviral, and anti-inflammatory agents. Commonly employed in the development of serotonin receptor modulators and other neuroactive substances. Also utilized in dye synthesis and fluorescent probes due to its aromatic amine structure. Preferred in some reactions for improved solubility and stability in acidic conditions.