β-Ala-Lys(AMCA) serves as a multifunctional dye, crucial in biological experiments. It aids researchers in observing cell structures, tracking biomolecules, evaluating cell functions, distinguishing cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Its applications span from basic scientific research to clinical diagnostics. Additionally, dyes are extensively used in traditional and emerging fields, including textile dyeing, functional textile processing, food pigments, and dye-sensitized solar cells.