DBCO-PEG-SH is a versatile dye used extensively in biological experiments. Dyes are critical tools that assist researchers in observing and analyzing cellular structures, tracking biomolecules, assessing cell functions, distinguishing cell types, detecting biomolecules, studying histopathology, and monitoring microorganisms. Their applications span from fundamental scientific research to clinical diagnostics. Dyes also have broad uses in traditional fields like textile dyeing and emerging areas such as functional textile processing, food coloring, and dye-sensitized solar cells.