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

View pricing for: Americas/Asia, Europe, Taiwan
Catalog No. Packaging Size Price Quantity
In Stock
Ships in 1-3 business days. Updated daily.

Out of Stock
Ships once in stock. More on the way.

Upon Request
Typically ships within 1 month. Will stock only when ordered. Cancellation restrictions apply.
23966-1 1 g
In Stock: > 10
Bulk Quote


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.

9002-98-6, 26913-06-4


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

Siegman S, Truong NF, Segura T. (2015). Encapsulation of PEGylated low-molecular-weight PEI polyplexes in hyaluronic acid hydrogels reduces aggregationActa Biomater. in Press, doi:10.1016/j.actbio.2015.09.020

Baranyi, L. et al. Rapid Generation of Stable Cell Lines Expressing High Levels of Erythropoietin, Factor VIII, and an Antihuman CD20 Antibody Using Lentiviral Vectors. Human Gene Therapy Methods 24, 214–227 (2013). doi:10.1089/hgtb.2013.002

Wulhfard, S., Baldi, L., Hacker, D. L. & Wurm, F. Valproic acid enhances recombinant mRNA and protein levels in transiently transfected Chinese hamster ovary cells. Journal of Biotechnology 148, 128–132 (2010). doi:10.1016/j.jbiotec.2010.05.003

Thomas M, Lu JJ, Ge Q, Zhang C, Chen J, Klibanov AM. (2005). Full deacylation of polyethylenimine dramatically boosts its gene delivery efficiency and specificity to mouse lung. Proc Natl Acad Sci U S A. 102(16):5679-84.

Durocher, Y., Perret, S. & Kamen, A. High-level and high-throughput recombinant protein production by transient transfection of suspension-growing human 293-EBNA1 cellsNucleic acids research 30, E9 (2002). doi:10.1093/nar/30.2.e9

Gloves & fume hood
Store at room temperature