CASNumber
38821-53-3
MolecularFormula
C16H19N3O4S•H2O
MolecularWeight
349.40
MechanismofAction
Likeβ-lactams,cephalosporinsinterferewithPBP(penicillinbindingprotein)activityinvolvedinthefinalphaseofpeptidoglycansynthesis.PBP’sareenzymeswhichcatalyzeapentaglycinecrosslinkbetweenalanineandlysineresiduesprovidingadditionalstrengthtothecellwall.Withoutapentaglycinecrosslink,theintegrityofthecellwallisseverelycompromisedandultimatelyleadstocelllysisanddeath.Resistancetocephalosporinsiscommonlyduetocellscontainingplasmidencodedβ-lactamases.
StorageConditions
-20°C
TariffCode
2941.90.5000
Form
Powder
Appearance
Whitetoyellowishcrystallinepowder
Source
Semi-synthetic
WaterContent(KarlFisher)
≤6.0%
pH
3.5-6.0
OpticalRotation
+80°to+90°
Assay
(OnDriedBasis):95.0-102.0%
SulfatedAsh
≤0.2%
Impurities
7-ADCA:≤1.0%
Cyclohexa-1,4-dienylglycine:≤1.00%
Cefalexin:≤5.0%
N,N-Dimethylaniline:≤20ppm
AnyOtherImpurity:≤1.0%