2-Anthracenylsulfonyl chloride is a versatile dye utilized across various fields. In biological research, dyes are essential for observing and analyzing cell structures, tracking biomolecules, evaluating cell functions, distinguishing cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Their applications extend from foundational scientific research to a broad scope of clinical diagnostics. Furthermore, dyes are prominent in traditional textile dyeing, functional textile processing, food pigmentation, and dye-sensitized solar cells.