Esomeprazole Related Compounds & Impurities

Esomeprazole is the S-enantiomer of omeprazole, a proton pump inhibitor used for gastro-oesophageal reflux disease, peptic ulcer and H. pylori eradication.

Simson Pharma Limited along with its subsidiary offices Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) is a trusted manufacturer and supplier of high-quality pharmaceutical reference standards, offering a comprehensive portfolio of Esomeprazole reference standards, pharmacopeial and non-pharmacopeial Esomeprazole impurities, related compounds, related substances, metabolites, stable isotope-labelled compounds, deuterium labelled compounds and nitrosamine (N-NO) reference standards.

These materials support pharmaceutical research and development, product development, ANDA and DMF submissions, quality control (QC), analytical method development and validation, stability studies, impurity identification, and genotoxic impurity assessment.

Our Esomeprazole-related reference standards are thoroughly characterized using advanced analytical techniques and are supplied with comprehensive Certificates of Analysis (COA) and supporting analytical data from our USFDA certified, ISO 17025 and ISO 17034 accredited Lab, to meet global regulatory expectations. EP and USP traceable reference standards can also be provided upon request, subject to availability. Simson is also a provider of EP and USP traceable standards. To ensure consistent quality and reliability, our reference standards are periodically re-tested according to established quality management procedures.

Pharmaceutical Reference Standards / Impurity Standards

Esomeprazole Magnesium Trihydarte
Esomeprazole Magnesium Trihydarte
  • CAT. No.E030000
  • CAS. No.217087-09-7
  • Mol. F.C34H36N6O6S2.Mg.3H2O
  • Mol. W.767.17 g/mol
  • Stock Status:Instock
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Esomeprazole sodium
Esomeprazole sodium
  • CAT. No.E030000B
  • CAS. No.161796-78-7
  • Mol. F.C17H18N3O3S.Na
  • Mol. W.367.40 g/mol
  • Stock Status:Instock
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Esomeprazole Magnesium Dihydrate
Esomeprazole Magnesium Dihydrate
  • CAT. No.E030000D
  • CAS. No.217087-10-0
  • Mol. F.C34H36N6O6S2.Mg.2H2O
  • Mol. W.749.20 g/mol
  • Stock Status:Instock
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Esomeprazole N-Oxide
Esomeprazole N-Oxide
  • CAT. No.E030007
  • CAS. No.118807-93-5
  • Mol. F.C8H7N2O2
  • Mol. W.163.15 g/mol
  • Stock Status:Instock
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Esomeprazole Impurity
Esomeprazole Impurity
  • CAT. No.E030008
  • CAS. No.NA
  • Mol. F.C9H13NOS
  • Mol. W.183.27 g/ mol
  • Stock Status:Limited Stock
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Esomeprazole R-Enantiomer
Esomeprazole R-Enantiomer
  • CAT. No.E030009
  • CAS. No.119141-89-8
  • Mol. F.C17H19N3O3S
  • Mol. W.345.42 g/mol
  • Stock Status:Under Synthesis
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Omeprazole Dihydropyridine
Omeprazole Dihydropyridine
  • CAT. No.E030010
  • CAS. No.NA
  • Mol. F.C16H15N3O4
  • Mol. W.313.31 g/mol
  • Stock Status:Instock
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Esomeprazole Magnesium Trihydarte
Esomeprazole Magnesium Trihydarte
  • CAT. No.E030012
  • CAS. No.217087-09-7
  • Mol. F.C34H36N6O6S2.Mg.3H2O
  • Mol. W.767.17 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole EP Impurity J
Esomeprazole EP Impurity J
  • CAT. No.E030013
  • CAS. No.NA
  • Mol. F.C15H15N3O3S
  • Mol. W.317.36 g/mol
  • Stock Status:Custom Synthesis
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4-Hydroxy Omeprazole Sulfide
4-Hydroxy Omeprazole Sulfide
  • CAT. No.E030015
  • CAS. No.103876-98-8
  • Mol. F.C16H17N3O2S
  • Mol. W.315.39 g/mol
  • Stock Status:Instock
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Esomeprazole Impurity D
Esomeprazole Impurity D
  • CAT. No.E030017
  • CAS. No.NA
  • Mol. F.C17H19N3O4S
  • Mol. W.361.42 g/mol
  • Stock Status:Custom Synthesis
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Desulfoxide 4-Demethyl Omeprazole Hydrochloride
Desulfoxide 4-Demethyl Omeprazole Hydrochloride
  • CAT. No.E030018
  • CAS. No.1384163-92-1(free base)
  • Mol. F.C16H17N3O2.HCl
  • Mol. W.319.79 g/mol
  • Stock Status:Instock
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5-Hydroxyesomeprazole
5-Hydroxyesomeprazole
  • CAT. No.E030022
  • CAS. No.358675-51-1
  • Mol. F.C16H17N3O3S
  • Mol. W.331.39 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Dihydropyridine Impurity
Esomeprazole Dihydropyridine Impurity
  • CAT. No.E030023
  • CAS. No.NA
  • Mol. F.NA
  • Mol. W.NA
  • Stock Status:Custom Synthesis
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Desmethoxy Keto Esomeprazole
Desmethoxy Keto Esomeprazole
  • CAT. No.E030026
  • CAS. No.2362529-32-4
  • Mol. F.C16H17N3O3S
  • Mol. W.331.39 g/mol
  • Stock Status:Under Synthesis
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Esomeprazole Impurity 1
Esomeprazole Impurity 1
  • CAT. No.E030027
  • CAS. No.2080-75-3
  • Mol. F.C8H8N2O2
  • Mol. W.164.16 g/mol
  • Stock Status:Instock
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5-methoxy-1-nitroso-1H-benzo[d]imidazole-2-thiol
5-methoxy-1-nitroso-1H-benzo[d]imidazole-2-thiol
  • CAT. No.E030028
  • CAS. No.NA
  • Mol. F.C8H7N3O2S
  • Mol. W.209.23 g/mol
  • Stock Status:Custom Synthesis
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5-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)thio)-1-nitroso-1H-benzo[d]imidazole
5-methoxy-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)thio)-1-nitroso-1H-benzo[d]imidazole
  • CAT. No.E030029
  • CAS. No.NA
  • Mol. F.C17H18N4O3S
  • Mol. W.358.41 g/mol
  • Stock Status:Custom Synthesis
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omeprazole Impurity
omeprazole Impurity
  • CAT. No.E030030
  • CAS. No.149082-03-01
  • Mol. F.C8H10N2O3
  • Mol. W.182.18 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 4
Esomeprazole Impurity 4
  • CAT. No.E030031
  • CAS. No.1831938-48-7
  • Mol. F.C16H17N3O2
  • Mol. W.283.33 g/mol
  • Stock Status:Custom Synthesis
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4-Methoxy-3,5-dimethylpyridine 1-Oxide
4-Methoxy-3,5-dimethylpyridine 1-Oxide
  • CAT. No.E030032
  • CAS. No.91219-89-5
  • Mol. F.C8H11NO2
  • Mol. W.153.18 g/mol
  • Stock Status:Instock
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Esomeprazole Impurity 12
Esomeprazole Impurity 12
  • CAT. No.E030035
  • CAS. No.143016-68-6
  • Mol. F.C8H10Cl3N
  • Mol. W.226.53 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 13
Esomeprazole Impurity 13
  • CAT. No.E030036
  • CAS. No.143016-67-5
  • Mol. F.C8H10Cl2N2O2
  • Mol. W.237.08 g/mol
  • Stock Status:Custom Synthesis
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Mixture of N-Methyl 5-Methoxy & N-Methyl 6-Methoxy Omeprazole Analog
Mixture of N-Methyl 5-Methoxy & N-Methyl 6-Methoxy Omeprazole Analog
  • CAT. No.E030037
  • CAS. No.NA
  • Mol. F.C18H21N3O3S
  • Mol. W.359.40 g/mol
  • Stock Status:Custom Synthesis
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N-Methyl Esomeprazole Isomer-1
N-Methyl Esomeprazole Isomer-1
  • CAT. No.E030038
  • CAS. No.NA
  • Mol. F.C18H21N3O3S
  • Mol. W.359.44 g/mol
  • Stock Status:Instock
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Des-Methoxy Esomeprazole
Des-Methoxy Esomeprazole
  • CAT. No.E030040
  • CAS. No.704910-88-3
  • Mol. F.C15H15N3OS
  • Mol. W.285.36 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 18
Esomeprazole Impurity 18
  • CAT. No.E030041
  • CAS. No.848694-10-0
  • Mol. F.C9H12ClNO2
  • Mol. W.201.65 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 26
Esomeprazole Impurity 26
  • CAT. No.E030042
  • CAS. No.NA
  • Mol. F.C36H42N6O6S2
  • Mol. W.718.89 g/mol
  • Stock Status:Instock
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((S)-2-(((5-Methoxy-1H-benzo[d]imidazol-2-yl)sulfinyl)methyl)-3,5-dimethylpyridin-4(1H)-one)
((S)-2-(((5-Methoxy-1H-benzo[d]imidazol-2-yl)sulfinyl)methyl)-3,5-dimethylpyridin-4(1H)-one)
  • CAT. No.E030043
  • CAS. No.NA
  • Mol. F.C16H17N3O3S
  • Mol. W.331.39 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 17
Esomeprazole Impurity 17
  • CAT. No.E030044
  • CAS. No.2572712-50-4
  • Mol. F.C10H17NO6S
  • Mol. W.279.31 g/mol
  • Stock Status:Instock
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N-Nitroso Desmethoxy Esomeprazole
N-Nitroso Desmethoxy Esomeprazole
  • CAT. No.E030045
  • CAS. No.NA
  • Mol. F.C16H16N4O3S
  • Mol. W.344.39 g/mol
  • Stock Status:Custom Synthesis
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4-Pyridinol,2-(chloromethyl)-3,5-dimethyl-,hydrochloride
4-Pyridinol,2-(chloromethyl)-3,5-dimethyl-,hydrochloride
  • CAT. No.E030046
  • CAS. No.220770-99-0
  • Mol. F.C8H11Cl2NO
  • Mol. W.208.09 g/mol
  • Stock Status:Custom Synthesis
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2-(chloromethyl)-3,5-dimethyl-4-nitropyridine
2-(chloromethyl)-3,5-dimethyl-4-nitropyridine
  • CAT. No.E030047
  • CAS. No.153476-68-7
  • Mol. F.C8H9ClN2O2
  • Mol. W.200.62 g/mol
  • Stock Status:Custom Synthesis
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6-methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole
6-methoxy-1-((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)-2-(((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-1H-benzo[d]imidazole
  • CAT. No.E030048
  • CAS. No.2101206-66-8
  • Mol. F.C26H30N4O4S
  • Mol. W.494.61 g/mol
  • Stock Status:Custom Synthesis
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(S)-5-Methoxy-2-[[(3,5-dimethyl-4-nitro-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole
(S)-5-Methoxy-2-[[(3,5-dimethyl-4-nitro-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole
  • CAT. No.E030049
  • CAS. No.853950-49-9
  • Mol. F.C16H16N4O4S
  • Mol. W.360.39 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 19
Esomeprazole Impurity 19
  • CAT. No.E030050
  • CAS. No.NA
  • Mol. F.C26H27N5O3S2
  • Mol. W.521.65 g/mol
  • Stock Status:Custom Synthesis
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N-Nitroso Esomeprazole
N-Nitroso Esomeprazole
  • CAT. No.E030051
  • CAS. No.NA
  • Mol. F.C16H16N4O3S
  • Mol. W.344.39 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 20
Esomeprazole Impurity 20
  • CAT. No.E030052
  • CAS. No.2748245-58-9
  • Mol. F.C16H15N3O2S
  • Mol. W.313.37 g/mol
  • Stock Status:Custom Synthesis
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(1-(5-methoxy-1H-benzo[d]imidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydropyridin-2-yl)methanesulfinic acid
(1-(5-methoxy-1H-benzo[d]imidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydropyridin-2-yl)methanesulfinic acid
  • CAT. No.E030053
  • CAS. No.NA
  • Mol. F.C16H17N3O4S
  • Mol. W.347.39 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 23
Esomeprazole Impurity 23
  • CAT. No.E030054
  • CAS. No.NA
  • Mol. F.C17H18N3O4
  • Mol. W.328.30 g/mol
  • Stock Status:Custom Synthesis
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2-(Mercaptomethyl)-4-methoxy-1-(5-methoxy-1H-benzo[d]imidazole-2-yl)-3,5-di methylpyridine-1-ium chloride
2-(Mercaptomethyl)-4-methoxy-1-(5-methoxy-1H-benzo[d]imidazole-2-yl)-3,5-di methylpyridine-1-ium chloride
  • CAT. No.E030055
  • CAS. No.NA
  • Mol. F.C17H20N3O2S.Cl
  • Mol. W.365.88 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 24
Esomeprazole Impurity 24
  • CAT. No.E030056
  • CAS. No.NA
  • Mol. F.C16H15N3O4
  • Mol. W.313.31 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 25
Esomeprazole Impurity 25
  • CAT. No.E030057
  • CAS. No.19648-27-7
  • Mol. F.C18H21N3O4S
  • Mol. W.375.44 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 8
Esomeprazole Impurity 8
  • CAT. No.E030058
  • CAS. No.NA
  • Mol. F.C36H42N6O6S2
  • Mol. W.718.89 g/mol
  • Stock Status:Instock
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Esomeprazole Impurity 5
Esomeprazole Impurity 5
  • CAT. No.E030059
  • CAS. No.727375-13-5
  • Mol. F.C8H11NO2
  • Mol. W.153.18 g/mol
  • Stock Status:Custom Synthesis
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2-Hydroxyglutaric Acid
2-Hydroxyglutaric Acid
  • CAT. No.E030061
  • CAS. No.2889-31-8
  • Mol. F.C18H21N3O3S
  • Mol. W.359.44 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 7
Esomeprazole Impurity 7
  • CAT. No.E030062
  • CAS. No.1820041-19-7
  • Mol. F.C18H21N3O3S
  • Mol. W.359.44 g/mol
  • Stock Status:Custom Synthesis
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N-Methyl Esomeprazole Isomer-2
N-Methyl Esomeprazole Isomer-2
  • CAT. No.E030063
  • CAS. No.1346240-11-6
  • Mol. F.C18H21N3O3S
  • Mol. W.359.40 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole N-Nitroso Impurity 1
Esomeprazole N-Nitroso Impurity 1
  • CAT. No.E030064
  • CAS. No.NA
  • Mol. F.C17H18N4O4S
  • Mol. W.374.40 g/mol
  • Stock Status:Custom Synthesis
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Ammonium1-(6-methoxy-1H-benzo(d)imidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydropyridine-2-carboxylate
Ammonium1-(6-methoxy-1H-benzo(d)imidazol-2-yl)-3,5-dimethyl-4-oxo-1,4-dihydropyridine-2-carboxylate
  • CAT. No.E030065
  • CAS. No.2227107-89-1
  • Mol. F.C16H14N3O4.NH4
  • Mol. W.330.34 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 9
Esomeprazole Impurity 9
  • CAT. No.E030066
  • CAS. No.2586079-06-1
  • Mol. F.C10H15NO5S
  • Mol. W.261.29 g/mol
  • Stock Status:Custom Synthesis
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Omeprazole Dimer Impurity
Omeprazole Dimer Impurity
  • CAT. No.E030067
  • CAS. No.NA
  • Mol. F.C26H27N5O4S2
  • Mol. W.537.70 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 11
Esomeprazole Impurity 11
  • CAT. No.E030068
  • CAS. No.2924835-55-0
  • Mol. F.C26H30N4O3S
  • Mol. W.478.60 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 10
Esomeprazole Impurity 10
  • CAT. No.E030069
  • CAS. No.1227380-90-6
  • Mol. F.C16H15N3O4
  • Mol. W.313.31 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 2
Esomeprazole Impurity 2
  • CAT. No.O040035
  • CAS. No.2512216-37-2
  • Mol. F.C16H17N3O2
  • Mol. W.283.33 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole Impurity 3
Esomeprazole Impurity 3
  • CAT. No.O040036
  • CAS. No.2819805-13-3
  • Mol. F.C32H28N6O7
  • Mol. W.608.60 g/mol
  • Stock Status:Custom Synthesis
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Isotope Labelled Compounds

Esomeprazole D3
Esomeprazole D3
  • CAT. No.E030011
  • CAS. No.NA
  • Mol. F.C17H16D3N3O3S
  • Mol. W.348.44 g/mol
  • Stock Status:Instock
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Esomeprazole-D6
Esomeprazole-D6
  • CAT. No.E030033
  • CAS. No.922800-06-4
  • Mol. F.C17H13D6N3O3S
  • Mol. W.351.45 g/mol
  • Stock Status:Custom Synthesis
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Esomeprazole- D6 Sodium Salt
Esomeprazole- D6 Sodium Salt
  • CAT. No.E030034
  • CAS. No.922731-04-2
  • Mol. F.C17H12D6N3NaO3S
  • Mol. W.373.43 g/mol
  • Stock Status:Instock
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Esomeprazole D3 Magnesium
Esomeprazole D3 Magnesium
  • CAT. No.E030060
  • CAS. No.NA
  • Mol. F.C17H16D3N3O3S.Mg
  • Mol. W.372.74 g/mol
  • Stock Status:Instock
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