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Whiteoroff-whitepowder
ImpurityProfile
Individualimpurity:Notmorethan1.0%Totalimpurities:Notmorethan2.0
WaterContent(KarlFisher)
Notmorethan1.0%
pH
2-4
MeltingPoint
145°C-155°C
OpticalRotation
+80°-+88°
Assay
Notlessthan97.0%
Cefmetazoleisabroadspectrumsecondgenerationcephalosporinantibiotic.TOKU-Eofferstwoformsofcefmetazole:cefmetazole,freeacid(C122),andcefmetazolesodium(C052).Cefmetazoleisfreelysolubleinwater92mg/mL.
56796-20-4
C15H17N7O5S3
471.53
Likeβ-lactams,cephalosporinsinterferewithPBP(penicillinbindingprotein)activityinvolvedinthefinalphaseofpeptidoglycansynthesis.PBP’sareenzymeswhichcatalyzeapentaglycinecrosslinkbetweenalanineandlysineresiduesprovidingadditionalstrengthtothecellwall.Withoutapentaglycinecrosslink,theintegrityofthecellwallisseverelycompromisedandultimatelyleadstocelllysisanddeath.Resistancetocephalosporinsiscommonlyduetocellscontainingplasmidencodedβ-lactamases.
-20°C
2941.90.3000
CefmetazoleisbroadspectrumantibiotictargetingawiderangeofGram-positiveandGram-negativebacteria.CefmetazoleismorepotentagainstmanyGram-negativeentericfloraandpathogensthanotherfirstgenerationcephalosporins.
Powder
Whiteoroff-whitepowder
Individualimpurity:Notmorethan1.0%Totalimpurities:Notmorethan2.0
Notmorethan1.0%
2-4
145°C-155°C
+80°-+88°
Notlessthan97.0%