HOOC-PEG-SH (MW 40000)

HOOC-PEG-SH (MW 40000) (HOOC-PEG-Thiol (MW 40000) ) is a reactive thiol PEG derivative with a terminal carboxyl group. The carboxyl group can react with amine or hydroxyl groups to form a stable amide bond or an unstable ester bond. The reaction of the carboxyl group allows the amine or hydroxyl group to be converted into a free thiol with a linear PEG linkage. The generated thiol group can be used to modify the surface of gold nanoparticles or participate in other PEGylation reactions. The PEG linkage between the thiol and carboxyl groups has good water solubility, flexible linker distance and higher stability[1].