N-(4-Methylumbelliferyl)-maleinimid serves as a multifunctional dye utilized extensively across various domains. In biological experiments, dyes are pivotal for observing and analyzing cell structures, tracking biomolecules, assessing cell functions, differentiating cell types, detecting biomolecules, exploring tissue pathology, and monitoring microorganisms. Their utilization spans from fundamental scientific research to a broad spectrum of clinical diagnostics. Additionally, dyes find applications in conventional industries like textile dyeing and in emerging sectors, including functional textile processing, food pigments, and dye-sensitized solar cells.