Disperse Blue 165 is a multifunctional dye. Dyes are crucial tools in biological experiments, helping researchers observe and analyze cell structures, track biomolecules, evaluate cell functions, distinguish cell types, detect biomolecules, study tissue pathology, and monitor microorganisms. Their applications range from basic scientific research to clinical diagnostics. Dyes are also extensively used in traditional fields such as textile dyeing, as well as in emerging fields like functional textile processing, food pigments, and dye-sensitized solar cells.