HO-PEG-NH2

Alpha-(hydroxy)-omega-(amino) poly(ethylene glycol) (HO-PEG-NH2) is a heterobifunctional precision PEG derivative with a defined chain length. The two ends bear hydroxyl and primary amine groups, respectively. Discrete chain lengths with different degrees of polymerization are available. The terminal hydroxyl group can be further modified by esterification, etherification, or other functional-group transformations. The primary amine can react with activated carboxyl groups or NHS esters to form amide bonds and introduce carboxyl-containing functional moieties. The two end groups can be coupled sequentially using compatible reactions and appropriate protection strategies, enabling surface immobilization, functional-molecule bridging, and directional spacer synthesis.

Customization available.