ceftazidime and its Impurities
Ceftazidime is used to treat many kinds of bacterial infections, including severe or life-threatening forms. Ceftazidime, sold under the brand names Fortaz. It is available as a generic medication. Reference standards of Ceftazidime API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(Z)-tert-Butyl 2-(((1-(2-aminothiazol-4-yl)-2-ethoxy-2-oxoethylidene)amino)oxy)-2-methylpropanoate
(Z)-tert-Butyl 2-(((1-(2-aminothiazol-4-yl)-2-ethoxy-2-oxoethylidene)amino)oxy)-2-methylpropanoate
Catalogue No.:PAI 03 006070
CAS :
86299-46-9
Molecular Formula : C15H23N3O5S
Molecular Weight : 357.40


(Z)-tert-Butyl 2-(((1-(2-aminothiazol-4-yl)-2-(benzo[d]thiazol-2-ylthio)-2-oxoethylidene)amino)oxy)-2-methylpropanoate
(Z)-tert-Butyl 2-(((1-(2-aminothiazol-4-yl)-2-(benzo[d]thiazol-2-ylthio)-2-oxoethylidene)amino)oxy)-2-methylpropanoate
Catalogue No.:PAI 03 006071
CAS :
89604-92-2
Molecular Formula : C20H22N4O4S3
Molecular Weight : 478.60


(Z)-5-(2-Aminothiazol-4-yl)-8,8,11,11-tetramethyl-4,9-dioxo-7,10-dioxa-3,6-diazadodec-5-en-1-oic Acid
(Z)-5-(2-Aminothiazol-4-yl)-8,8,11,11-tetramethyl-4,9-dioxo-7,10-dioxa-3,6-diazadodec-5-en-1-oic Acid
Catalogue No.:PAI 03 006072
CAS :
NA
Molecular Formula : C15H22N4O6S
Molecular Weight : 386.40


(Z)-tert-Butyl 2-(((1-(2-aminothiazol-4-yl)-2-((2-methoxy-2-oxoethyl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoate
(Z)-tert-Butyl 2-(((1-(2-aminothiazol-4-yl)-2-((2-methoxy-2-oxoethyl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoate
Catalogue No.:PAI 03 006073
CAS :
NA
Molecular Formula : C16H24N4O6S
Molecular Weight : 400.40


(Z)-7-(2-Aminothiazol-4-yl)-10,10-dimethyl-3,6-dioxo-2,9-dioxa-5,8-diazaundec-7-en-11-oic acid
(Z)-7-(2-Aminothiazol-4-yl)-10,10-dimethyl-3,6-dioxo-2,9-dioxa-5,8-diazaundec-7-en-11-oic acid
Catalogue No.:PAI 03 006074
CAS :
NA
Molecular Formula : C12H16N4O6S
Molecular Weight : 344.30


(Z)-2-(2-Aminothiazol-4-yl)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)acetic Acid
(Z)-2-(2-Aminothiazol-4-yl)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)acetic Acid
Catalogue No.:PAI 03 006075
CAS :
86299-47-0
Molecular Formula : C13H19N3O5S
Molecular Weight : 329.40


tert-Butyl (E)-2-(((1-(2-aminothiazol-4-yl)-2-ethoxy-2-oxoethylidene)amino)oxy)-2-methylpropanoate
tert-Butyl (E)-2-(((1-(2-aminothiazol-4-yl)-2-ethoxy-2-oxoethylidene)amino)oxy)-2-methylpropanoate
Catalogue No.:PAI 03 006076
CAS :
1924627-99-5
Molecular Formula : C15H23N3O5S
Molecular Weight : 357.43


(E)-2-(2-Aminothiazol-4-yl)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)acetic Acid
(E)-2-(2-Aminothiazol-4-yl)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)acetic Acid
Catalogue No.:PAI 03 006077
CAS :
NA
Molecular Formula : C15H23N3O5S
Molecular Weight : 329.37


tert-Butyl (E)-2-(((1-(2-aminothiazol-4-yl)-2-(benzo[d]thiazol-2-ylthio)-2-oxoethylidene)amino)oxy)-2-methylpropanoate
tert-Butyl (E)-2-(((1-(2-aminothiazol-4-yl)-2-(benzo[d]thiazol-2-ylthio)-2-oxoethylidene)amino)oxy)-2-methylpropanoate
Catalogue No.:PAI 03 006078
CAS :
NA
Molecular Formula : C20H22N4O4S3
Molecular Weight : 478.6


(1R,8S)-8-((E)-2-(2-Aminothiazol-4-yl)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)acetamido)-7-oxo-4-(pyridin-1-ium-1-ylmethyl)-2-thiabicyclo[4.2.0]oct-4-ene-5-carboxylate
(1R,8S)-8-((E)-2-(2-Aminothiazol-4-yl)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)acetamido)-7-oxo-4-(pyridin-1-ium-1-ylmethyl)-2-thiabicyclo[4.2.0]oct-4-ene-5-carboxylate
Catalogue No.:PAI 03 006079
CAS :
NA
Molecular Formula : C27H31N5O7S2
Molecular Weight : 601.69


(6R,7R)-7-((Z)-2-(2-Aminothiazol-4-yl)-2-(((2-carboxypropan-2-yl)oxy)imino)acetamido)-8-oxo-3-(pyridin-1-ium-1-ylmethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide
(6R,7R)-7-((Z)-2-(2-Aminothiazol-4-yl)-2-(((2-carboxypropan-2-yl)oxy)imino)acetamido)-8-oxo-3-(pyridin-1-ium-1-ylmethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide
Catalogue No.:PA 30 0211002
CAS :
1301254-48-7
Molecular Formula : C22H22N6O8S2
Molecular Weight : 562.57


(R)-2-((R)-((Z)-2-(2-Aminothiazol-4-yl)-2-(((2-carboxypropan-2-yl)oxy)imino)acetamido)(carboxy)methyl)-5-(pyridin-1-ium-1-ylmethyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate
(R)-2-((R)-((Z)-2-(2-Aminothiazol-4-yl)-2-(((2-carboxypropan-2-yl)oxy)imino)acetamido)(carboxy)methyl)-5-(pyridin-1-ium-1-ylmethyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylate
Catalogue No.:PA 30 0211003
CAS :
NA
Molecular Formula : C22H24N6O8S2
Molecular Weight : 564.59