• Specified molecular weight of PEI  may be offered by custom synthesis. Please contact us for quotation.
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Product Description

PEI-PEG-PEI is a block copolymer of two linear PEI (LPEI) with one linear PEG, LPEI-PEG-LPEI. The MW indicated in the product refers to the MW of each PEI block. PEI is capped with hydroxyl group.

PEG-PEI, copolymers of cationic poly(ethylene imine) (PEI) and polyethylene glycol (PEG) are well-studied compounds that markedly improve the in vitro and in vivo delivery of oligonucleotides and nucleic acids (DNA, siRNA). By varying the MW of PEI and PEG, PEG-PEI drug conjugates, polyplexes or nanoparticles can be prepared with a dynamic range of size, surface charge, and stability, which all are important to the transfection efficiency. PEG-PEI copolymers can be synthesized with customer specified MW.

Additional information

PEI Molecular Weight

1K, 2K, 5K, 10K

PEG molecular Weight

1000, 2000, 5000, 10K

Package Size

100mg, 500mg