Quantitative purity testing is not performed on this product. The minimum activity is 11,500 units per milligram. The maximum allowable related substances is 5.5%. These values vary from lot to lot and are reported in the product Certificate of Analysis. The amount of powder in each vial may be determined by dividing the number of units in a given package size by the lot specific activity results. For example, 10000000 units / 11500 IU per milligram = 869.6 mg per vial. Please see the link below to review a sample or lot specific Certificate:
https://www.sigmaaldrich.com/product/sigma/c1511#product-documentation
C1511
Colistin sodium methanesulfonate
~11,500 U/mg
Sinónimos:
Colimycin sodium methanesulfonate, Methanesulfonic acid derivative of Polymyxin E, Polymyxin E sodium methanesulfonate
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About This Item
Fórmula empírica (notación de Hill):
C58H115N16Na5O28S5
Número de CAS:
Peso molecular:
1759.90
EC Number:
MDL number:
UNSPSC Code:
51102829
PubChem Substance ID:
NACRES:
NA.85
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form
powder
Quality Level
specific activity
~11,500 U/mg
solubility
H2O: 50 mg/mL
antibiotic activity spectrum
Gram-negative bacteria
mode of action
cell membrane | interferes
storage temp.
2-8°C
SMILES string
[Na+].[Na+].[Na+].[Na+].[Na+].CS([O-])(=O)=O.CS([O-])(=O)=O.CS([O-])(=O)=O.CS([O-])(=O)=O.CS([O-])(=O)=O.CCC(C)CCCCC(=O)N[C@@H](CCN)C(=O)N[C@@H](C(C)O)C(=O)N[C@@H](CCN)C(=O)N[C@H]1CCNC(=O)[C@@H](NC(=O)[C@H](CCN)NC(=O)[C@@H](CCN)NC(=O)[C@H](CC(C)C)NC(=O)[C@@H](CC(C)C)NC(=O)[C@H](CCN)NC1=O)C(C)O
InChI
1S/C53H100N16O13.5CH4O3S.5Na/c1-9-30(6)12-10-11-13-41(72)60-33(14-20-54)48(77)69-43(32(8)71)53(82)65-36(17-23-57)45(74)64-38-19-25-59-52(81)42(31(7)70)68-49(78)37(18-24-58)62-44(73)34(15-21-55)63-50(79)39(26-28(2)3)67-51(80)40(27-29(4)5)66-46(75)35(16-22-56)61-47(38)76;5*1-5(2,3)4;;;;;/h28-40,42-43,70-71H,9-27,54-58H2,1-8H3,(H,59,81)(H,60,72)(H,61,76)(H,62,73)(H,63,79)(H,64,74)(H,65,82)(H,66,75)(H,67,80)(H,68,78)(H,69,77);5*1H3,(H,2,3,4);;;;;/q;;;;;;5*+1/p-5/t30?,31-,32-,33+,34-,35+,36+,37+,38+,39+,40-,42+,43+;;;;;;;;;;/m1........../s1
InChI key
WSDSONZFNWDYGZ-BKFDUBCBSA-I
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General description
Chemical structure: peptide
Application
Colistin sodium methanesulfate is used to permeabilize bacterial cell membranes and to study mannose-resistant haemagglutination.
Biochem/physiol Actions
Colistin is a cationic, multicomponent lipopeptide antibiotic. It consists of a cyclic heptapeptide with tripeptide side chain, acylated at the N terminus by a fatty acid. It exhibits a potent anti-endotoxin.[1][2] Colistin interacts with the anionic LPS molecules and displaces calcium and magnesium ions. It solubilzes the cytoplasmic membrane resulting in leakage of cytosol which contributes to the bactericidal effect.[3][1]
Mode of Action: Binds to lipids on the cell cytoplasmic membrane of Gram-negative bacteria and disrupts the cell wall integrity.
Antimicrobial spectrum: Gram-negative bacteria.
Antimicrobial spectrum: Gram-negative bacteria.
Other Notes
Keep container tightly closed in a dry and well-ventilated place.Keep in a dry place.
Storage Class
11 - Combustible Solids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Certificados de análisis (COA)
Lot/Batch Number
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Los clientes también vieron
Sachin Gupta et al.
Indian journal of critical care medicine : peer-reviewed, official publication of Indian Society of Critical Care Medicine, 13(2), 49-53 (2009-11-03)
One of the greatest achievements of modern medicine is the development of antibiotics against life-threatening infections, but the emergence of multidrug-resistant (MDR) gram negative bacteria has drastically narrowed down the therapeutic options against them. This limitation has led clinicians to
Roberto Imberti et al.
Chest, 138(6), 1333-1339 (2010-06-19)
Infections caused by multidrug-resistant gram-negative bacteria have caused a resurgence of interest in colistin. To date, information about pharmacokinetics of colistin is very limited in critically ill patients, and no attempts have been made to evaluate its concentration in BAL.
M.J. Rogers et al.
Infection (Munich), 14, 79-79 (1986)
Matthew E Falagas et al.
Expert review of anti-infective therapy, 6(5), 593-600 (2008-10-14)
Despite the constantly increasing need for new antimicrobial agents, antibiotic drug discovery and development seem to have greatly decelerated in recent years. Presented with the significant problem of advancing antimicrobial resistance, the global scientific community has attempted to find alternative
Lidia Dalfino et al.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 54(12), 1720-1726 (2012-03-17)
Gram-negative bacteria susceptible only to colistin (COS) are emerging causes of severe nosocomial infections, reviving interest in the use of colistin. However, consensus on the most effective way to administer colistin has not yet been reached. All patients who had
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How I can convert U/mg (specific activity of this product) to mg/mg? Thanks
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