BODIPY FL Hydrazide is a green-fluorescent dye, BODIPY FL Hydrazide is reactive with aldehyde/ketone on polysaccharides and glycoproteins, yielding a reversible Schiff base product that can be transformed to a stable linkage using a reducing agent like sodium borohydride or sodium cyanoborohydride. (λ ex =495 nm, λ em =516 nm).