t-Boc-N-amido-PEG-CH2COOH, MW 10,000 is is an amine protected polydisperse PEG. The carboxylic acid is reactive with amine in the presence of activating agent, such as EDC or HATU. The tert-butoxycarbonyl protecting group (t-boc) can be easily removed under acidic condition to yield a free amine which can then react with an active ester (NHS). Reagent grade, for research purpose.
Usually ships within 24 hours.