C.I. Direct Violet 9, a versatile dye, serves a pivotal role across various fields. This compound is crucial not only in biological experiments where it enables the observation and analysis of cell structures, tracking of biomolecules, evaluation of cell functions, differentiation of cell types, detection of biomolecules, examination of tissue pathology, and monitoring of microorganisms, but also spans a broad spectrum of applications. Beyond basic scientific research and clinical diagnostics, C.I. Direct Violet 9 is extensively employed in traditional sectors like textile dyeing and in cutting-edge areas, including functional textile processing, food pigments, and dye-sensitized solar cells.