Product Description: ATTO 425 Azide is an azide derivative of ATTO 425, the maximum excitation and emission wavelength: 439/489 nm. ATTO 425 azide is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. Strain-promoted alkyne-azide cycloaddition (SPAAC) can also occur with molecules containing DBCO or BCN groups.