6-Azidohexanoic acid STP ester

6-Azidohexanoic Acid STP Ester is an amine-reactive, water-soluble labeling reagent with an azide group and a terminal 4-Sulfo-2,3,5,6-tetrafluorophenyl (STP) group. 6-Azidohexanoic Acid STP Ester is used to modify proteins, antibodies, and other amine-containing biopolymers in aqueous media. The azide group can react with alkyne, BCN, DBCO via Click Chemistry to yield a stable triazole linkage. STP esters can react with primary amines, forming covalent amide bonds, and typically display much better stability toward hydrolysis in aqueous media, resulting in more efficiency and better reproducible labeling of biopolymers.