pantoprazole and its Impurities
A proton pump inhibitor drug, Pantaprazole inhibits gastric acid secretion. It is used in the short term treatment of erosive esophagitis associated with gastroesophageal reflux disease. Reference standards of Pantoprazole API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

![1-(5-(Difluoromethoxy)-1H-benzo[d]imidazol-2-yl)-3 PA 16 04520](https://www.pharmaffiliates.com/public/pimages/PA1604520.jpg)
1-(5-(Difluoromethoxy)-1H-benzo[d]imidazol-2-yl)-3-methoxy-4-oxo-1,4-dihydropyridine-2-carboxylic Acid
1-(5-(Difluoromethoxy)-1H-benzo[d]imidazol-2-yl)-3-methoxy-4-oxo-1,4-dihydropyridine-2-carboxylic Acid
Catalogue No.:PA 16 04520
CAS :
2512209-15-1
Molecular Formula : C15H11F2N3O5
Molecular Weight : 351.26


Pantoprazole Related Compound A (5-(difluoromethoxy)-2-[[(3,4-dimethoxy-2-pyridinyl)methyl]sulfonyl (1494909)
Pantoprazole Related Compound A (5-(difluoromethoxy)-2-[[(3,4-dimethoxy-2-pyridinyl)methyl]sulfonyl (1494909)
Catalogue No.:PA USP1494909
CAS :
127780-16-9
Molecular Formula : NA
Molecular Weight : NA


Pantoprazole Related Compound B (5-(difluoromethoxy)-2-[[(3,4-dimethoxy-2-pyridinyl)methyl]thio]-1H (1494910)
Pantoprazole Related Compound B (5-(difluoromethoxy)-2-[[(3,4-dimethoxy-2-pyridinyl)methyl]thio]-1H (1494910)
Catalogue No.:PA USP1494910
CAS :
102625-64-9
Molecular Formula : NA
Molecular Weight : NA


Pantoprazole Related Compound E (6,6'-bis(difluoromethoxy)-2,2'-bis[[(3,4-dimethoxypyridin-2-yl)met (1494942)
Pantoprazole Related Compound E (6,6'-bis(difluoromethoxy)-2,2'-bis[[(3,4-dimethoxypyridin-2-yl)met (1494942)
Catalogue No.:PA USP1494942
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


Sodium 5-(difluoromethoxy)-2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)benzo[d]imidazol-1-ide
Sodium 5-(difluoromethoxy)-2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)benzo[d]imidazol-1-ide
Catalogue No.:PAI 16 023010
CAS :
NA
Molecular Formula : C16H14F2N3NaO3S
Molecular Weight : 389.35

![2-(((5-(Difluoromethoxy)-1H-benzo[d]imidazol-2-yl) PA 16 0041001](https://www.pharmaffiliates.com/public/pimages/PA160041001.jpg)
2-(((5-(Difluoromethoxy)-1H-benzo[d]imidazol-2-yl)sulfinyl)methyl)pyridine-3,4-diyl Diformate
2-(((5-(Difluoromethoxy)-1H-benzo[d]imidazol-2-yl)sulfinyl)methyl)pyridine-3,4-diyl Diformate
Catalogue No.:PA 16 0041001
CAS :
NA
Molecular Formula : C16H11F2N3O6S
Molecular Weight : 411.34


2-(((4-Chloro-3-methoxypyridin-2-yl)methyl)thio)-6-(difluoromethoxy)-1H-benzo[d]imidazole
2-(((4-Chloro-3-methoxypyridin-2-yl)methyl)thio)-6-(difluoromethoxy)-1H-benzo[d]imidazole
Catalogue No.:PA 16 0041004
CAS :
368890-20-4
Molecular Formula : C15H12ClF2N3O2S
Molecular Weight : 371.79


2-(((4-Chloro-3-methoxypyridin-2-yl)methyl)sulfinyl)-6-(difluoromethoxy)-1H-benzo[d]imidazole
2-(((4-Chloro-3-methoxypyridin-2-yl)methyl)sulfinyl)-6-(difluoromethoxy)-1H-benzo[d]imidazole
Catalogue No.:PA 16 0041005
CAS :
409098-86-8
Molecular Formula : C15H12ClF2N3O3S
Molecular Weight : 387.79


5-(Difluoromethoxy)-2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)-1-nitroso-1H-benzo[d]imidazole
5-(Difluoromethoxy)-2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)-1-nitroso-1H-benzo[d]imidazole
Catalogue No.:PA 16 0041013
CAS :
NA
Molecular Formula : C16H14F2N4O4S
Molecular Weight : 396.37


6,6'-Bis(difluoromethoxy)-2,2'-bis(((3,4-dimethoxypyridin-2-yl)methyl)thio)-1H,1'H-5,5'-bibenzo[d]imidazole
6,6'-Bis(difluoromethoxy)-2,2'-bis(((3,4-dimethoxypyridin-2-yl)methyl)thio)-1H,1'H-5,5'-bibenzo[d]imidazole
Catalogue No.:PAI 16 023018
CAS :
2251784-93-5
Molecular Formula : C32H28F4N6O6S2
Molecular Weight : 732.73

![10-(Difluoromethoxy)-3,4-dimethoxy-5H-benzo[4,5]im PA 16 0041018](https://www.pharmaffiliates.com/public/pimages/PA160041018.jpg)
10-(Difluoromethoxy)-3,4-dimethoxy-5H-benzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazin-13-ium Chloride
10-(Difluoromethoxy)-3,4-dimethoxy-5H-benzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazin-13-ium Chloride
Catalogue No.:PA 16 0041018
CAS :
138786-78-4
Molecular Formula : C16H14ClF2N3O3S
Molecular Weight : 401.81


5-(Difluoromethoxy)-2-(((3,4-dimethoxypyridin-2-yl)methyl)sulfonyl)-1-nitroso-1H-benzo[d]imidazole
5-(Difluoromethoxy)-2-(((3,4-dimethoxypyridin-2-yl)methyl)sulfonyl)-1-nitroso-1H-benzo[d]imidazole
Catalogue No.:PA 16 0041020
CAS :
NA
Molecular Formula : C16H14F2N4O6S
Molecular Weight : 428.37


6,6'-bis(Difluoromethoxy)-2,2'-bis(((3,4-dimethoxypyridin-2-yl)methyl)sulfinyl)-1-nitroso-1H,1'H-5,5'-bibenzo[d]imidazole
6,6'-bis(Difluoromethoxy)-2,2'-bis(((3,4-dimethoxypyridin-2-yl)methyl)sulfinyl)-1-nitroso-1H,1'H-5,5'-bibenzo[d]imidazole
Catalogue No.:PA 16 0041029
CAS :
NA
Molecular Formula : C32H27F4N7O9S2
Molecular Weight : 793.72


6,6'-bis(Difluoromethoxy)-2,2'-bis(((3,4-dimethoxypyridin-2-yl)methyl)sulfinyl)-1,1'-dinitroso-1H,1'H-5,5'-bibenzo[d]imidazole
6,6'-bis(Difluoromethoxy)-2,2'-bis(((3,4-dimethoxypyridin-2-yl)methyl)sulfinyl)-1,1'-dinitroso-1H,1'H-5,5'-bibenzo[d]imidazole
Catalogue No.:PA 16 0041030
CAS :
NA
Molecular Formula : C32H26F4N8O10S2
Molecular Weight : 822.72