ICG PEG N3 (MW 2000)

ICG PEG N3 (MW 2000) is an indocyanine green (ICG) azide fluorescent dye utilized for labeling amino groups in peptides, proteins, and oligonucleotides. This compound serves as a click chemistry reagent, featuring an azide group that enables copper-catalyzed azide-alkyne cycloaddition (CuAAC) with alkynyl-containing molecules. It can also participate in strain-promoted azide-alkyne cycloaddition (SPAAC) with molecules containing DBCO or BCN groups, exhibiting excitation and emission at 785/813 nm respectively.