• Polymyxin E2 sulfate, EvoPure packaged and labeled.

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SKU: P056

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Polymyxin E2 sulfate or colistin B is one of the two major components of polymyxin E (colistin). Polymyxin E1 and E2 are structurally similar and differ only by a fatty acid group at the N-terminus. Polymyxin E1 contains 6-methyloctanoic acid and polymyxin E2 (colistin B) contains 6-methylheptanoic acid. Together, polymyxin E1 and E2 comprise approximately 85% of polymyxin E; however, 13 different polymyxin E components have been indentified.

    CAS Number

    7239-48-7 (free base)

    Molecular Formula

    C52H98N16O13 · xH2SO4 (lot specific)

    Molecular Weight

    1155.43 (Free base)

    Mechanism of Action

    Polymyxin E has a bactericidal effect on Gram negative bacteria by interacting with and displacing essential ions in the lipopolysaccharide (LPS) outer cell wall leading to increased permeability and eventually lysis and death of the cell.

    Storage Conditions


    Tariff Code



    Polymyxin E is used primarily against Gram negative bacteria including Pseudomonas aeruginosa, Klebsiella pneumoniae, and multi-drug resistant Enterobacteriaceae,


    Microbiology Applications

    Polymyxin E1 and E2 (colistin A and B, respectively) can be used individually to study and compare em>in vitro antimicrobial activity with colistin (polymyxin E complex) or other polymyxins.



    Bacillus polymyxa var. colistinus

Technical Data

Spectral Data - Polymyxin E2, EvoPure®

HNMR Spectra


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Solvent: D2O
Instrument: Mercury 300
Frequency: 300 MHz


FTIR Spectra

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Mass Spectra

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Polarity/Scan Type: Positive
Solvent: H2O
Solution Concentration: 10 mg/mL


    Falagas, M. E. "Colistin: The Revival of Polymyxins for the Management of Multidrug-resistant Gram-negative Bacterial Infections." Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America 40.9 (2005): 1333-341. www.ncbi.gov. Web. 10 Sept. 2012.

    Bergen, Philip J. et. al. "Colistin Methanesulfonate Is an Inactive Prodrug of Colistin against Pseudomonas Aeruginosa." Antimicrobial Agents and Chemotherapy 50.6 (2006): 1953-958. Ncbi.gov. Web. 5 Oct. 2012.

    Leifert C., Ritchie J.Y. and Waites W.M., Contaminants of plant-tissue and cell cultures. World Journal of Microbiology and Biotechnology, Vol. 7, pp. 452-469, 1991.

    MJ Mueller, W Brodschelm. "Signaling in the elicitation process is mediated through the octadecanoid pathway leading to jasmonic acid". Proc. Natl. Acad. Sci. USA Vol. 90, pp. 7490-7494, August 1993.

    Li, Jian, and Roger L. Nation. "Comment On: Pharmacokinetics of Inhaled Colistin in Patients with Cystic Fibrosis." Journal of Antimicrobial Chemotherapy (2006): 222-23. Oxfordjournals.org. Web. 19 June 2013.

    Decolin, Dominique, and Pierre Leroy. "Hyphenated Liquid Chromatographic Method for the Determination of Colistin Residues in Bovine Tissues." Oxfordjournals.org. N.p., n.d. Web. 19 June 2013.

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