Used as a key intermediate in the synthesis of various dyes and photographic sensitizers, particularly in the production of cyanine dyes for imaging applications. It plays an important role in the development of infrared-absorbing compounds used in optical recording media, such as CD-R and DVD-R technologies. Also utilized in organic synthesis for developing fluorescent probes and labeling agents due to its indole backbone and fluorine substitution, which enhance photostability and emission properties. Its derivatives are explored in pharmaceutical research for potential bioactive molecules targeting neurological and inflammatory pathways.