ATTO 680 azide is an azide derivative of ATTO 680 with peak excitation/emission wavelengths of 681/698 nm. This compound functions as a click chemistry reagent, containing an azide group that can undergo a copper-catalyzed azide-alkyne cycloaddition reaction (CuAAC) with molecules containing an alkyne group. It can also participate in a strain-promoted alkyne-azide cycloaddition reaction (SPAAC) with molecules containing DBCO or BCN groups.