英文名称
Colistin Sulfate (Mixture of A and B compound)
Standards; Others; Pharmaceutical/API Drug Impurities/Metabolites; Antibotics;
Cyclic polypeptide antibiotic produced by Bacillus polymyxa. Complex mixture of at least 30 components, primarily colistins A and B.[a]D= -65° (c= 1, Water) LOD: 3% DAB= a,γ-diaminobutyric acidHeavy Metals: 20ppm Colistin A R= (+)-6-methyloctanoylArsenic Content: 2ppm/g Colistin B R= 6-methylheptanoylSulfate: 16-18%Biological Potency (dry basis): 19600U/mg