2-Aza-ε-adenosine (2-Aza-1,N6-ethenoadenosine) serves as a versatile dye with broad applications in various fields. As essential components in biological experimentation, dyes enable scientists to examine and track cell structures, monitor biomolecules, assess cellular functions, differentiate among cell types, explore tissue pathology, and scrutinize microorganisms. Their utility extends beyond biological research into clinical diagnostics, influencing a wide spectrum of industries including traditional textile dyeing, innovative textile processing, food coloring, and dye-sensitized solar cells.