ATTO 590 Azide is an azide derivative of ATTO 590, with peak excitation/emission wavelengths of 594/622 nm. This compound serves as a click chemistry reagent, containing an azide group that can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAC) with molecules containing an alkyne group. Additionally, it can participate in strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules featuring DBCO or BCN groups.