2-Methoxy-2-(naphthalen-2-yl)acetonitrile serves as a multifunctional dye with extensive applications across various fields. Dyes play a crucial role in biological experiments, enabling researchers to observe and analyze cell structures, track biomolecules, evaluate cell functions, and distinguish types of cells. Additionally, they are invaluable in detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Beyond their scientific and clinical uses, dyes find utility in traditional sectors such as textile dyeing and in innovative areas like functional textile processing, food pigments, and dye-sensitized solar cells. These applications demonstrate the broad utility of dyes from fundamental research to advanced diagnostic tools.