Cationic golden yellow 2K, a versatile dye, serves as a crucial tool in various biological experiments. This compound facilitates 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. Its applications extend beyond basic scientific research to encompass clinical diagnostics. Additionally, Cationic golden yellow 2K is commonly utilized in traditional industries like textile dyeing and emerging sectors, including functional textile processing, food pigments, and dye-sensitized solar cells.