Sumitone Fast Red B is a multifunctional dye. It plays a crucial role in biological experiments by aiding researchers in observing and analyzing cell structures, tracking biomolecules, evaluating cell functions, distinguishing cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Its applications extend from basic scientific research to a wide range of clinical diagnostics. Additionally, dyes are essential in traditional fields like textile dyeing and emerging fields such as functional textile processing, food pigments, and dye-sensitized solar cells.