Direct Yellow 86 is a multifunctional dye. Dyes are crucial in biological experiments, aiding researchers in observing and analyzing cell structures, tracking biomolecules, evaluating cell functions, distinguishing cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Their applications span from basic scientific research to a wide range of clinical diagnostics. Additionally, dyes are extensively used in traditional sectors like textile dyeing, as well as in emerging fields such as functional textile processing, food pigments, and dye-sensitized solar cells.