Product Description
4-Arm PEG-Hydrazide (4-arm PEG-HZ) is a multiarm PEG derivative with hydrazide (CONHNH2) groups at each terminal of the four arms connected to one pentaerythritol core. 4 arm-PEG-hydrazide can react with ketone or aldehyde to form acyl hydrazone linkers, which are pH sensitive and can be used for reversible PEGylation. Hydrazine PEG is also used to PEGylate carboxyl, carboxylic acid groups.
