Branched PEI-g-PEG, PEG Mn 550 was derived from Sigma-Aldrich Product 408727. Based upon an approximate Mw of 25,000 for the branched PEI, Product 900926 contains approximately 55 grafted PEG chains per PEI unit (by NMR).
Branched PEI-g-PEG, PEG Mn 5000 was derived from Sigma-Aldrich Product 408727. Based upon an approximate Mw of 25,000 for the branched PEI, Product 900926 contains approximately 15 grafted PEG chains per PEI unit (by NMR).
