9-Aminoanthracene Hydrochloride is primarily used in research and development, particularly in the field of organic chemistry. It serves as a key intermediate in the synthesis of various anthracene derivatives, which are valuable in the production of dyes, pigments, and fluorescent materials. Its fluorescent properties make it useful in the development of sensors and probes for biological and chemical detection. Additionally, it is employed in photophysical studies to understand the behavior of excited states in organic molecules. The compound also finds application in the preparation of organic semiconductors, which are essential in the fabrication of electronic devices such as OLEDs and solar cells.