4-Arm PEG-NH2.HCl (MW 10000)

4-Arm PEG-NH2 HCl (MW 10000) [4-Arm PEG-amine HCL salt (MW 10000) ] is a multi-arm PEG derivative with amine groups attached to the end of each of the four arms connected to a pentaerythritol core. The reactive primary amine (NH2) groups can swiftly react with activated carboxylic acids, such as NHS esters, to form stable amide bonds.