8-Arm PEG-NH2 (MW 40000)

8-Arm PEG-NH2 (MW 40000) (8-Arm PEG-Amine (MW 40000)) is a multi-arm PEG derivative with amino groups at each end of the eight arms. The reactive primary amine or NH2 groups can react rapidly with activated carboxylic acids such as NHS esters to form stable amide bonds.