Biotin-tagged KR-33493 is a multifunctional dye widely utilized in various sectors. In biological experiments, dyes facilitate 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. These applications extend from fundamental research to a broad spectrum of clinical diagnostics. Additionally, dyes find extensive use in traditional industries like textile dyeing and emerging domains such as functional textile processing, food pigments, and dye-sensitized solar cells.