Polyethylenimine, Linear, MW 25000, Transfection Grade (PEI 25K™)

CAS Number:
9002-98-6, 26913-06-4
Linear Formula:


Grouped product items
Catalog Number Unit Size Price QTY
23966-1 1 g
23966-100 100mg
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PEI 25K is a powerful, trusted, and cost-effective transient transfection reagent. In HEK293 and CHO expression systems, PEI offers consistently high gene expression on a wide scale (96 well plates up to 100 L bioreactors). Each year, more researchers and companies turn to Polysciences PEI to gain a critical edge in their work. Relative to most other options, using PEI to prepare transfection reagents in-house can offer as much as a 40% reduction in total transfection costs.

Shipping Requirements:
White to yellow solid
Melting Point:
Molecular Weight:
hot water, cold water at low pH, methanol, and ethanol.
Insoluble In: benzene, ethyl ether and acetone

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Siegman, S., Truong, N. F., & Segura, T. (2015). Encapsulation of PEGylated low-molecular-weight PEI polyplexes in hyaluronic acid hydrogels reduces aggregation. Acta biomaterialia, 28, 45-54.

Thomas, M., Lu, J. J., Ge, Q., Zhang, C., Chen, J., & Klibanov, A. M. (2005). Full deacylation of polyethylenimine dramatically boosts its gene delivery efficiency and specificity to mouse lung. Proceedings of the National Academy of Sciences, 102(16), 5679-5684.

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Wulhfard, S., Baldi, L., Hacker, D. L., & Wurm, F. (2010). Valproic acid enhances recombinant mRNA and protein levels in transiently transfected Chinese hamster ovary cells. Journal of biotechnology, 148(2-3), 128-132.

Gloves & fume hood
Store at room temperature
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