Picolyl azide-PEG2-NHS ester serves as a bifunctional PEG linker containing picoyl azide moiety, which bolsters the efficiency and speed of the CuAAC reaction for improved biocompatible labeling. Compared with conventional azides, picolyl azide will allow the use of at least 10-fold less copper catalyst to yield the same click reaction rate as regular azide, because the picolyl moiety can chelate Cu to raise the effective concentration of Cu(I) at the reaction site. The NHS ester moiety can react specifically and efficiently with primary amines to form a covalent amide bond. Water solubility is elevated via the PEG2 spacer.
Usually ships within 24 hours.