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Colistin Methanesulfonate (sodium salt)

Catalog No.
prodrug for antibiotic colistin (also known as polymyxin E)
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Colistin methanesulfonate is an inactive prodrug of colistin (also known as polymyxin E), which is an antibiotic with effect against most Gram-negative bacteria, but also causes nephro- and neurotoxicity [1]. Colistin is produced by certain strains of the bacteria Paenibacillus polymyxa, and belongs to the class of polypeptide antibiotics known as polymyxins.

In Vitro: Studying the time-kill kinetics of Colistin methanesulfonate against a type culture of pseudomonas aeruginosa found that 8.0 or 32 mg/l Colistin methanesulfonate began killing at approximately 90 or 30 min, and the mean AUC0-240 values were 186.3±6.0 and 90.4±4.1, respectively [2]. Besides, by investigation among mucoid and nonmucoid strains of Pseudomonas aeruginosa isolated from patients with cystic fibrosis, Colistin methanesulfonate was found to require a concentration of 16 times the MIC to achieve complete killing within 24 h [3].

In Vivo: no data available.

Clinical trial: no data available.

[1] Nation R L, Li J.  Colistin in the 21st century.[J]. Current Opinion in Infectious Diseases, 2009, 22(6): 535-543.
[2] Bergen P J, Li J, Rayner C R, et al.  Colistin methanesulfonate is an inactive prodrug of colistin against Pseudomonas aeruginosa.[J]. Antimicrobial Agents and Chemotherapy, 2006, 50(6): 1953-1958.
[3] Li J, Turnidge J D, Milne R W, et al.  In Vitro Pharmacodynamic Properties of Colistin and Colistin Methanesulfonate against Pseudomonas aeruginosaIsolates from Patients with Cystic Fibrosis[J]. Antimicrobial Agents and Chemotherapy, 2001, 45(3): 781-785.

Chemical Properties

StorageStore at -20°C
Cas No.8068-28-8
SynonymsColimycin M,Polymyxin E sodium methanesulfonate
Solubility≥53.9 mg/mL in H2O; insoluble in EtOH; insoluble in DMSO
Chemical Namesodium (Z)-N-((6Z,9Z)-7,10-dihydroxy-8-(1-hydroxyethyl)-5-((Z)-oxido(((1Z,4E,7Z,10Z,13Z,16Z,19Z)-2,5,11,14-tetrahydroxy-3-(1-hydroxyethyl)-12,15-diisobutyl-8,17,20-trioxido-6,9,18-tris(2-((sulfomethyl)amino)ethyl)-1,4,7,10,13,16,19-heptaazacyclotricosa-1,
SDFDownload SDF
Canonical SMILESCCC(CCCC/C([O-])=N/C(/C(O)=N/C(/C(O)=N/C(/C([O-])=N/C(/C([O-])=N/C(/C([O-])=N/C(/C(O)=N/C(/C(O)=N/C(/C([O-])=N/C(/C(O)=N\1)CCNCS(O)(=O)=O)CCNCS(O)(=O)=O)CC(C)C)CC(C)C)CCNCS(O)(=O)=O)CC/N=C(O)/C1C(O)C)CCNCS(O)(=O)=O)C(O)C)CCNCS(O)(=O)=O)C.[Na+].[Na+].[Na+]
Shipping ConditionShip with blue ice, or upon other requests.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while.


Cell experiment [1]:

Cell lines

P. aeruginosa

Preparation method

The solubility of this compound in H2O is ≥ 53.9mg/mL. General tips for obtaining a higher concentration: Please warm the tube at 37℃ for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below -20℃ for several months.

Reacting condition



Colistin methanesulfonate has a MIC range of 0.5 to 1 mg /l. In addition, by investigating among the mucoid and non-mucoid strains of Pseudomonas aeruginosa isolated from cystic fibrosis patients, it was found that colistin methanesulfonate requires 16 times the MIC concentration to completely kill the bacteria within 24 hours.


[1]. Bozkurt-Guzel C, Gerceker AA. In vitro pharmacodynamic properties of colistin methanesulfonate and amikacin against Pseudomonas aeruginosa. Indian J Med Microbiol. 2012 Jan-Mar;30(1):34-8. PubMed PMID: 22361758.

Quality Control

Quality Control & MSDS

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Chemical structure

Colistin Methanesulfonate (sodium salt)