omeprazole and its Impurities

A selective and irreversible proton pump inhibitor, Omeprazole is used in the treatment of gastroesophageal reflux disease (GERD) and peptic ulcers.Omeprazole exists as a racemic mixture of R and S enantiomers.Reference standards of Omeprazole API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 41 results for omeprazole Impurities
Drug Reference Standards & Impurity Synthesis in India
PA 15 0051017

2-(((5-Methoxy-1H-benzo[d]imidazol-2-yl)sulfinyl)methyl)-1,3,5-trimethylpyridin-4(1H)-one

2-(((5-Methoxy-1H-benzo[d]imidazol-2-yl)sulfinyl)methyl)-1,3,5-trimethylpyridin-4(1H)-one

  • Catalogue No.:PA 15 0051017

  • CAS :

    NA

  • Molecular Formula : C17H19N3O3S

  • Molecular Weight : 345.42

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051018

6-Methoxy-2-(4-methoxy-3,5-dimethylpyridin-2-yl)-1H-benzo[d]imidazole

6-Methoxy-2-(4-methoxy-3,5-dimethylpyridin-2-yl)-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051018

  • CAS :

    2555002-22-5

  • Molecular Formula : C16H17N3O2

  • Molecular Weight : 283.33

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051019

2-((6-Methoxy-1H-benzo[d]imidazol-2-yl)methyl)-3,5-dimethylpyridin-4-ol

2-((6-Methoxy-1H-benzo[d]imidazol-2-yl)methyl)-3,5-dimethylpyridin-4-ol

  • Catalogue No.:PA 15 0051019

  • CAS :

    1831938-48-7

  • Molecular Formula : C16H17N3O2

  • Molecular Weight : 283.33

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051020

((5-Methoxy-1H-benzo[d]imidazol-2-yl)sulfinyl)(4-methoxy-3,5-dimethylpyridin-2-yl)methanone

((5-Methoxy-1H-benzo[d]imidazol-2-yl)sulfinyl)(4-methoxy-3,5-dimethylpyridin-2-yl)methanone

  • Catalogue No.:PA 15 0051020

  • CAS :

    NA

  • Molecular Formula : C17H17N3O4S

  • Molecular Weight : 359.4

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051021

Bis-Desmethoxy Omeprazole Sulfide

Bis-Desmethoxy Omeprazole Sulfide

  • Catalogue No.:PA 15 0051021

  • CAS :

    704910-94-1

  • Molecular Formula : C15H15N3S

  • Molecular Weight : 269.37

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051022

2,3-Lutidine

2,3-Lutidine

  • Catalogue No.:PA 15 0051022

  • CAS :

    583-61-9

  • Molecular Formula : C7H9N

  • Molecular Weight : 107.16

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051023

6-Methoxy-1H-benzo[d]imidazole-2-sulfonic Acid

6-Methoxy-1H-benzo[d]imidazole-2-sulfonic Acid

  • Catalogue No.:PA 15 0051023

  • CAS :

    106135-28-8

  • Molecular Formula : C8H8N2O4S

  • Molecular Weight : 228.22

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051024

5-Methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1-nitroso-1H-benzo[d]imidazole

5-Methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1-nitroso-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051024

  • CAS :

    NA

  • Molecular Formula : C17H18N4O4S

  • Molecular Weight : 374.42

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051025

3,9-Dimethoxy-2,4-dimethyl-5H-benzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazin-13-ium Chloride

3,9-Dimethoxy-2,4-dimethyl-5H-benzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazin-13-ium Chloride

  • Catalogue No.:PA 15 0051025

  • CAS :

    121459-89-0

  • Molecular Formula : C17H18ClN3O2S

  • Molecular Weight : 363.86

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051026

5-Methoxy-2-(4-methoxy-3,5-dimethyl-2-methylenepyridin-1(2H)-yl)-1H-benzo[d]imidazole

5-Methoxy-2-(4-methoxy-3,5-dimethyl-2-methylenepyridin-1(2H)-yl)-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051026

  • CAS :

    NA

  • Molecular Formula : C17H19N3O2

  • Molecular Weight : 297.36

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051027

3,9-Dimethoxy-2,4-dimethylbenzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazine

3,9-Dimethoxy-2,4-dimethylbenzo[4,5]imidazo[1,2-b]pyrido[1,2-d][1,2,4]thiadiazine

  • Catalogue No.:PA 15 0051027

  • CAS :

    2451927-87-8

  • Molecular Formula : C17H17N3O2S

  • Molecular Weight : 327.4

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051028

2,9-Dimethoxy-1,3-dimethylbenzo[4',5']imidazo[2',1':2,3]imidazo[1,5-a]pyridin-12(12aH)-one

2,9-Dimethoxy-1,3-dimethylbenzo[4',5']imidazo[2',1':2,3]imidazo[1,5-a]pyridin-12(12aH)-one

  • Catalogue No.:PA 15 0051028

  • CAS :

    2451927-89-0

  • Molecular Formula : C17H17N3O3

  • Molecular Weight : 311.34

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051029

2-((3,5-Dimethylpyridin-2-yl)methoxy)-5-methoxy-1H-benzo[d]imidazole

2-((3,5-Dimethylpyridin-2-yl)methoxy)-5-methoxy-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051029

  • CAS :

    NA

  • Molecular Formula : C16H17N3O2

  • Molecular Weight : 283.33

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051030

2-(((6-Methoxy-1H-benzo[d]imidazol-2-yl)oxy)methyl)-3,5-dimethylpyridin-4-ol

2-(((6-Methoxy-1H-benzo[d]imidazol-2-yl)oxy)methyl)-3,5-dimethylpyridin-4-ol

  • Catalogue No.:PA 15 0051030

  • CAS :

    2451927-95-8

  • Molecular Formula : C16H17N3O3

  • Molecular Weight : 299.33

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051031

Omeprazole Dimer Impurity

5-Methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)thio)-1H-benzo[d]imidazole compound with 6-methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)thio)-1H-benzo[d]imidazole (1:1)

  • Catalogue No.:PA 15 0051031

  • CAS :

    NA

  • Molecular Formula : C26H30N4O3S

  • Molecular Weight : 478.61

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051032

6-Methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)thio)-1H-benzo[d]imidazole

6-Methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)thio)-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051032

  • CAS :

    2924835-55-0

  • Molecular Formula : C26H30N4O3S

  • Molecular Weight : 478.61

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051033

4-Methoxy-1-(6-methoxy-1H-benzo[d]imidazol-2-yl)-3,5-dimethylpyridin-1-ium-2-carboxylate

4-Methoxy-1-(6-methoxy-1H-benzo[d]imidazol-2-yl)-3,5-dimethylpyridin-1-ium-2-carboxylate

  • Catalogue No.:PA 15 0051033

  • CAS :

    NA

  • Molecular Formula : C17H17N3O4

  • Molecular Weight : 327.34

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051034

1-(6-Methoxy-1-methyl-1H-benzo[d]imidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydropyridine-2-carboxylic Acid

1-(6-Methoxy-1-methyl-1H-benzo[d]imidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydropyridine-2-carboxylic Acid

  • Catalogue No.:PA 15 0051034

  • CAS :

    NA

  • Molecular Formula : C17H17N3O4

  • Molecular Weight : 327.34

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051035

(6-Methoxy-1H-benzo[d]imidazol-2-yl)(4-methoxy-3,5-dimethylpyridin-2-yl)methanethione

(6-Methoxy-1H-benzo[d]imidazol-2-yl)(4-methoxy-3,5-dimethylpyridin-2-yl)methanethione

  • Catalogue No.:PA 15 0051035

  • CAS :

    NA

  • Molecular Formula : C17H17N3O2S

  • Molecular Weight : 327.4

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051036

2-((5-Methoxy-1H-benzo[d]imidazol-2-yl)methyl)-3,5-dimethyl-1,4-dihydropyridin-4-ol

2-((5-Methoxy-1H-benzo[d]imidazol-2-yl)methyl)-3,5-dimethyl-1,4-dihydropyridin-4-ol

  • Catalogue No.:PA 15 0051036

  • CAS :

    NA

  • Molecular Formula : C16H19N3O2

  • Molecular Weight : 285.35

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051037

6-Methoxy-2-((4-methoxy-3,5-dimethylpyridin-2-yl)methoxy)-1H-benzo[d]imidazole

6-Methoxy-2-((4-methoxy-3,5-dimethylpyridin-2-yl)methoxy)-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051037

  • CAS :

    2451927-88-9

  • Molecular Formula : C17H19N3O3

  • Molecular Weight : 313.36

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051038

1-(5-Methoxy-1H-benzimidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydro-2-pyridinecarboxylic Acid Ammonia Salt

1-(5-Methoxy-1H-benzimidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydro-2-pyridinecarboxylic Acid Ammonia Salt

  • Catalogue No.:PA 15 0051038

  • CAS :

    2227107-89-1

  • Molecular Formula : C16H18N4O4

  • Molecular Weight : 330.34

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051039

Omeprazole-1-oxide

Omeprazole-1-oxide

  • Catalogue No.:PA 15 0051039

  • CAS :

    1427498-68-7

  • Molecular Formula : C17H19N3O4S

  • Molecular Weight : 361.42

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051040

2-(((6-Methoxy-1H-benzo[d]imidazol-2-yl)thio)methyl)-3,5-dimethylpyridin-4(1H)-one

2-(((6-Methoxy-1H-benzo[d]imidazol-2-yl)thio)methyl)-3,5-dimethylpyridin-4(1H)-one

  • Catalogue No.:PA 15 0051040

  • CAS :

    151602-50-5

  • Molecular Formula : C16H17N3O2S

  • Molecular Weight : 315.39

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Drug Reference Standards & Impurity Synthesis in India
PA IPRSO015

Omeprazole (IPRSO015)

Omeprazole (IPRSO015)

  • Catalogue No.:PA IPRSO015

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051041

(S)-2-(((3,5-Dimethyl-4-nitropyridin-2-yl)methyl)sulfinyl)-6-methoxy-1H-benzo[d]imidazole

(S)-2-(((3,5-Dimethyl-4-nitropyridin-2-yl)methyl)sulfinyl)-6-methoxy-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051041

  • CAS :

    853950-49-9

  • Molecular Formula : C16H16N4O4S

  • Molecular Weight : 360.39

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Drug Reference Standards & Impurity Synthesis in India
PA IMPO011

Omeprazole Sulphone (Omeprazole Impurity D) (IMPO011)

Omeprazole Sulphone (Omeprazole Impurity D) (IMPO011)

  • Catalogue No.:PA IMPO011

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051042

6-Methoxy-2-(((4-methoxy-3-methylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole

6-Methoxy-2-(((4-methoxy-3-methylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051042

  • CAS :

    124473-15-0

  • Molecular Formula : C16H17N3O3S

  • Molecular Weight : 331.39

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051043

(4-Methoxy-3,5-dimethylpyridine-2,6-diyl)dimethanol Hydrochloride

(4-Methoxy-3,5-dimethylpyridine-2,6-diyl)dimethanol Hydrochloride

  • Catalogue No.:PA 15 0051043

  • CAS :

    NA

  • Molecular Formula : C10H16ClNO3

  • Molecular Weight : 233.69

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051044

6-Methoxy-1H-benzo[d]imidazole

6-Methoxy-1H-benzo[d]imidazole

  • Catalogue No.:PA 15 0051044

  • CAS :

    4887-80-3

  • Molecular Formula : C8H8N2O

  • Molecular Weight : 148.17

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051045

6,6'-Bis(trifluoromethoxy)-3H,3'H-[5,5'-bibenzo[d]imidazole]-2,2'-dithiol

6,6'-Bis(trifluoromethoxy)-3H,3'H-[5,5'-bibenzo[d]imidazole]-2,2'-dithiol

  • Catalogue No.:PA 15 0051045

  • CAS :

    NA

  • Molecular Formula : C16H8F6N4O2S2

  • Molecular Weight : 466.38

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051046

2-(2-(5-Methoxy-1H-benzo[d]imidazol-2-yl)ethyl)-3,5-dimethyl-1,4-dihydropyridin-4-ol

2-(2-(5-Methoxy-1H-benzo[d]imidazol-2-yl)ethyl)-3,5-dimethyl-1,4-dihydropyridin-4-ol

  • Catalogue No.:PA 15 0051046

  • CAS :

    NA

  • Molecular Formula : C17H21N3O2

  • Molecular Weight : 299.37

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Drug Reference Standards & Impurity Synthesis in India
PA WSM 00515008

Omeprazole (WSM)

Omeprazole (WSM)

  • Catalogue No.:PA WSM 00515008

  • CAS :

    73590-58-6

  • Molecular Formula : C17H19N3O3S

  • Molecular Weight : 345.42

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051047

8-Methoxy-1,3-dimethylbenzo[4',5']imidazo[2',1':2,3]imidazo[1,5-a]pyridine-2,12-dione

8-Methoxy-1,3-dimethylbenzo[4',5']imidazo[2',1':2,3]imidazo[1,5-a]pyridine-2,12-dione

  • Catalogue No.:PA 15 0051047

  • CAS :

    NA

  • Molecular Formula : C16H13N3O3

  • Molecular Weight : 295.3

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Drug Reference Standards & Impurity Synthesis in India
PA BP 1297

Omeprazole Impurity Standard (1297)

Omeprazole Impurity Standard (1297)

  • Catalogue No.:PA BP 1297

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051048

2-Methoxy-7,9-dimethyl-6-thioxo-5,6-dihydro-8H-pyrido[1,2-a]quinoxalin-8-one

2-Methoxy-7,9-dimethyl-6-thioxo-5,6-dihydro-8H-pyrido[1,2-a]quinoxalin-8-one

  • Catalogue No.:PA 15 0051048

  • CAS :

    NA

  • Molecular Formula : C15H14N2O2S

  • Molecular Weight : 286.35

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051049

5-Methoxy-1-nitroso-1H-benzo[d]imidazole-2-thiol

5-Methoxy-1-nitroso-1H-benzo[d]imidazole-2-thiol

  • Catalogue No.:PA 15 0051049

  • CAS :

    NA

  • Molecular Formula : C8H7N3O2S

  • Molecular Weight : 209.22

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051050

4-Methoxy-2-(((5-methoxy-1-nitroso-1H-benzo[d]imidazol-2-yl)sulfonyl)methyl)-3,5-dimethylpyridine 1-oxide

4-Methoxy-2-(((5-methoxy-1-nitroso-1H-benzo[d]imidazol-2-yl)sulfonyl)methyl)-3,5-dimethylpyridine 1-oxide

  • Catalogue No.:PA 15 0051050

  • CAS :

    NA

  • Molecular Formula : C17H18N4O6S

  • Molecular Weight : 406.41

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051051

Omeprazole Sulfide N1-Methyl 5-Methoxy Analog

Omeprazole Sulfide N1-Methyl 5-Methoxy Analog

  • Catalogue No.:PA 15 0051051

  • CAS :

    2243644-60-0

  • Molecular Formula : C18H21N3O2S

  • Molecular Weight : 343.45

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051052

2-(Pyridin-2-yl)-1H-benzo[d]imidazole-6-carboxylic Acid

2-(Pyridin-2-yl)-1H-benzo[d]imidazole-6-carboxylic Acid

  • Catalogue No.:PA 15 0051052

  • CAS :

    669070-64-8

  • Molecular Formula : C13H9N3O2

  • Molecular Weight : 239.23

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Drug Reference Standards & Impurity Synthesis in India
PA 15 0051053

1-Methyl-1H-benzo[d]imidazole-5-carboxylic Acid

1-Methyl-1H-benzo[d]imidazole-5-carboxylic Acid

  • Catalogue No.:PA 15 0051053

  • CAS :

    53484-17-6

  • Molecular Formula : C9H8N2O2

  • Molecular Weight : 176.18

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