NHS-PEG-CHO (MW 2000) (NHS-PEG-Aldehyde (MW 2000) ) is a PEG derivative consisting of an aldehyde group (-CHO), a PEG unit, and an NHS ester. NHS esters can be conjugated to amino acids or other molecules containing amino groups. Aldehyde groups are reactive functional groups that can react with compounds containing amino or hydroxyl groups[1].
