Used primarily as an intermediate in the synthesis of indole derivatives, particularly in the production of pharmaceuticals and agrochemicals. It plays a key role in the Fischer indole synthesis, where it reacts with carbonyl compounds to form substituted indoles—structures commonly found in bioactive molecules. Its hydrochloride salt form enhances stability and solubility, making it suitable for controlled reaction conditions in organic synthesis. Commonly employed in research laboratories for developing compounds with potential therapeutic activity, including anti-inflammatory and anticancer agents.