Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Omeprazole, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Omeprazole impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Omeprazole-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.
Our Omeprazole-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.
Omeprazole Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 4-Desmethoxy Omeprazole-d3 | Stable Isotopes | CS-T-73460 | 1794759-05-9 | Enquire |
| 4-Desmethoxy Omeprazole-d3 Sulfide | Stable Isotopes | CS-T-73242 | 1794938-78-5 | Enquire |
| 5’-Hydroxyomeprazole-13C,D2 sodium | Stable Isotopes | CS-BU-00101 | 1215629-45-0(Unlabeled) | Enquire |
| 5-Hydroxy Omeprazole-D3 | Stable Isotopes | CS-T-56217 | 1189882-58-3 | Enquire |
| 5-Hydroxy Omeprazole-d3 Sodium Salt | Stable Isotopes | CS-T-99211 | Not Available | Enquire |
| 5-O-Desmethyl Omeprazole-d3 | Stable Isotopes | CS-T-88668 | 1189679-99-9 | Enquire |
| 5-O-Desmethyl Omeprazole-d3 Sulfide | Stable Isotopes | CS-T-88826 | 1189968-01-1 | Enquire |
| Esomeprazole D3 (benzo[d]imidazole-D3) | Stable Isotopes | CS-P-08296 | 119141-88-7 (Unlabelled) | Enquire |
| Esomeprazole Sodium D3 | Stable Isotopes | CS-O-06832 | 161796-78-7(Unlabeled) | Enquire |
| Esomeprazole Sodium D6 | Stable Isotopes | CS-O-06833 | 922731-04-2 | Enquire |
| Esomeprazole-D6 | Stable Isotopes | CS-N-05240 | 922800-06-4 | Enquire |
| Esomeprazole-d3 (methoxy-d3) | Stable Isotopes | CS-T-94459 | 2182068-27-3 | In Stock |
| Esomeprazole-d3 potassium | Stable Isotopes | CS-BU-00010 | 119141-88-7 (unlabeled) | In Stock |
| Esomeprazole-d3 Sodium Salt | Stable Isotopes | CS-T-94914 | 2182068-27-3 (Freebase) | Enquire |
| N-(4-Methoxy-3,5-dimethyl-2-pyridinyl)methyl Omeprazole-d3 | Stable Isotopes | CS-T-82376 | 1346599-69-6 | Enquire |
| N-(4-Methoxy-3,5-dimethyl-2-pyridinyl)methyl Omeprazole-d3 S... | Stable Isotopes | CS-T-80012 | 1346598-97-7 | Enquire |
| N-(4-Methoxy-3,5-dimethyl-2-pyridinyl)methyl Omeprazole-d3 S... | Stable Isotopes | CS-T-82704 | 1346603-82-4 | Enquire |
| N-Methyl Esomeprazole-d3(Mixture of isomers with the methyla... | Stable Isotopes | CS-T-97310 | Not Available | Enquire |
| N-Methyl Omeprazole-d3(Mixture of isomers with the methylate... | Stable Isotopes | CS-T-99165 | Not Available | Enquire |
| Omeprazole Acid-d3 Methyl Ester Sulfide | Stable Isotopes | CS-T-83258 | 1329797-04-7 | Enquire |
| Omeprazole D6 | Stable Isotopes | CS-O-37776 | 922731-02-0 | Enquire |
| Omeprazole N-oxide-d3 | Stable Isotopes | CS-O-10448 | 176219-04-8 (Unlabeled) | Enquire |
| Omeprazole sulfide-(4-methoxy-D3-Pyridine) | Stable Isotopes | CS-T-59944 | 922731-00-8 | Enquire |
| Omeprazole sulfide-(5-methoxy-d3) | Stable Isotopes | CS-T-83658 | 922730-98-1 | Enquire |
| Omeprazole sulfone D3 | Stable Isotopes | CS-O-10447 | 1189891-71-1 | Enquire |
| Omeprazole-13C | Stable Isotopes | CS-O-03017 | 1261395-28-1 | In Stock |
| Omeprazole-13C, D3 Sulfone N-Oxide | Stable Isotopes | CS-F-00179 | 158812-85-2 (unlabelled) | Enquire |
| Omeprazole-4-methoxy D3 | Stable Isotopes | CS-T-59942 | 922731-10-0 | Enquire |
| Omeprazole-d3 (5-methoxy-d3) | Stable Isotopes | CS-O-02623 | 922731-01-9 | In Stock |
| Omeprazole-d3 (benzimidazole-4,6,7-d3) | Stable Isotopes | CS-ZE-06254 | 934293-92-2 | Enquire |
| Omeprazole-D3 Sulfone N-Oxide | Stable Isotopes | CS-F-00058 | 2748468-58-6 | Enquire |
| o-Toluoyl-5-hydroxy Omeprazole Sulfide-d3 | Stable Isotopes | CS-T-86727 | 1276635-87-0 | Enquire |
| S-Deoxy-5-Hydroxy Acetate Omeprazole-d3 | Stable Isotopes | CS-T-102762 | Not Available | Enquire |
API Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Esomeprazole | API Standards | CS-ED-02296 | 119141-88-7 | In Stock |
| Esomeprazole Magnesium | API Standards | CS-O-30905 | 161973-10-0 | In Stock |
| Esomeprazole magnesium dihydrate | API Standards | CS-O-04263 | 217087-10-0 | In Stock |
| Esomeprazole magnesium trihydrate | API Standards | CS-DO-00013 | 217087-09-7 | In Stock |
| Esomeprazole potassium | API Standards | CS-BU-00007 | 161796-84-5 | Enquire |
| Esomeprazole sodium | API Standards | CS-O-01460 | 161796-78-7 | In Stock |
| Omeprazole | API Standards | CS-O-10304 | 73590-58-6 | In Stock |
| Omeprazole Pellets | API Standards | CS-DT-00032 | Not Available | Enquire |
| Omeprazole Sodium | API Standards | CS-O-04924 | 95510-70-6 | In Stock |
Metabolites
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (S)-Omeprazole desmethyl impurity | Metabolites | CS-O-47749 | Not Available | Enquire |
| 4-Desmethoxy Omeprazole Sulfide | Metabolites | CS-T-16123 | 704910-89-4 | In Stock |
| 4-Hydroxy Omeprazole | Metabolites | CS-T-28123 | 301669-82-9 | Enquire |
| 4-Hydroxy Omeprazole Sulfide | Metabolites | CS-T-28117 | 103876-98-8 | In Stock |
| 5-Hydroxy Esomeprazole | Metabolites | CS-O-32554 | 19648-27-7 | Enquire |
| 5-O-Desmethyl Omeprazole | Metabolites | CS-T-16364 | 151602-49-2 | In Stock |
| Omeprazole acid sodium salt | Metabolites | CS-O-30491 | 120003-84-1 | In Stock |
| Omeprazole N-Oxide | Metabolites | CS-O-07977 | 176219-04-8 | In Stock |
Impurities
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "N-(4-Methoxy-3,5-dimethyl-2-pyridinyl)methyl Omeprazole Sul... | Impurities | CS-T-81597 | 1346599-74-3 | Enquire |
| (R) Omeprazole Potassium Salt | Impurities | CS-EO-03737 | 161796-81-2 | Enquire |
| (S)-5-Hydroxy Omeprazole | Impurities | CS-T-79065 | 196489-27-7 | Enquire |
| 2-((5-methoxy-1H benzo(d)imidazol-2-ylthio)methyl)-3,5 dimet... | Impurities | CS-O-36541 | Not Available | Enquire |
| 2-((5-Methoxy-1H-benzo[d]imidazol-2-yl)methyl)-3,5-dimethylp... | Impurities | CS-O-43276 | Not Available | Enquire |
| 2-(5-Methoxy-1H-benzimidazole-2-ylmethyl)-3,5 dimethyl-1H-py... | Impurities | CS-O-36542 | 1384163-92-1 | Enquire |
| 2,2'-(((4-methoxy-3,5-dimethylpyridine-2,6-diyl)bis(methylen... | Impurities | CS-O-35744 | Not Available | Enquire |
| 2-[[(5-methoxy-1H-benzimidazol-2-yl) sulfinyl] methyl]-3, 5-... | Impurities | CS-O-36461 | 2362529-32-4 | In Stock |
| 3-Hydroxyomeprazole | Impurities | CS-ED-02054 | 176219-02-6 | Enquire |
| 4-Acetyloxy Omeprazole Sulfide | Impurities | CS-T-47058 | 1359829-71-2 | Enquire |
| 4-Acetyloxy Omeprazole Sulfone | Impurities | CS-T-64306 | 1391054-80-0 | Enquire |
| 4-Desmethoxy-4-chloro Omeprazole | Impurities | CS-T-16106 | 863029-89-4 | In Stock |
| 4-Desmethoxy-4-chloro Omeprazole Sulfide | Impurities | CS-T-16108 | 220757-74-4 | In Stock |
| 4-Desmethoxy-4-nitro Omeprazole | Impurities | CS-T-16114 | 317807-10-6 | In Stock |
| 4-Desmethoxy-4-nitro Omeprazole Sulfide | Impurities | CS-T-16115 | 142885-91-4 | Enquire |
| 4-Desmethoxy-4-nitro Omeprazole Sulfone | Impurities | CS-T-52188 | 1076199-93-3 | Enquire |
| 4-Hydroxy Omeprazole Sulfone | Impurities | CS-T-28146 | 1346600-70-1 | Enquire |
| 5-Hydroxy Omeprazole Sulfide | Impurities | CS-T-57713 | 103876-99-9 | Enquire |
| 5-Hydroxyomeprazole sulfone | Impurities | CS-BX-00206 | 151602-51-6 | Enquire |
| 5-Methoxy-1-methyl-1H-benzimidazole-2-thiol | Impurities | CS-T-96089 | 58764-00-4 | Enquire |
| 5-O-Desmethyl Omeprazole Sulfide | Impurities | CS-T-16371 | 103877-02-7 | Enquire |
| 6-Methoxy-2-(4-methoxy-3,5-dimethyl-2-pyridinyl)-1H-benzimid... | Impurities | CS-O-46125 | 2555002-22-5 | Enquire |
| 6-methoxy-N-alkyl omeprazole sulphide | Impurities | CS-O-44854 | Not Available | Enquire |
| desmethoxy Esomeprazole impuruty | Impurities | CS-O-42902 | 1432904-84-1 (freebase) | Enquire |
| Desulfoxide 4-Demethyl Omeprazole | Impurities | CS-T-88918 | 1384163-92-1 | Enquire |
| Esomeprazole dihydropyridin methanesulfinicacid | Impurities | CS-O-51834 | Not Available | Enquire |
| Esomeprazole EP Impurity B | Impurities | CS-T-38031 | 119141-89-8 | In Stock |
| Esomeprazole Ether Impurity | Impurities | CS-O-46649 | Not Available | Enquire |
| Esomeprazole Impurity 1 | Impurities | CS-O-11885 | Not Available | Enquire |
| Esomeprazole Impurity 12 | Impurities | CS-P-08592 | 2101206-66-8 | In Stock |
| Esomeprazole Impurity 13 | Impurities | CS-EO-03541 | 143016-67-5 | Enquire |
| Esomeprazole Impurity 16 | Impurities | CS-O-46323 | 848696-99-1 | Enquire |
| Esomeprazole Impurity 24 | Impurities | CS-O-53631 | 2451927-93-6 | Enquire |
| Esomeprazole Impurity 3 | Impurities | CS-O-35960 | 2819805-13-3 | Enquire |
| Esomeprazole Impurity 4 | Impurities | CS-O-35386 | 1831938-48-7 | Enquire |
| Esomeprazole impurity J | Impurities | CS-AQ-00199 | Not Available | Enquire |
| N-(4-Methoxy-3,5-dimethyl-2-pyridinyl)methyl Omeprazole | Impurities | CS-T-80106 | 1346599-85-6 | In Stock |
| N-Methyl Esomeprazole (Mixture of isomers with the methylate... | Impurities | CS-T-93421 | 1820041-19-7 and 1346240-11-6 | Enquire |
| N-Methyl Esomeprazole Isomer-1 | Impurities | CS-EO-02126 | 1820041-19-7 | Enquire |
| N-Methyl Esomeprazole Isomer-1 | Impurities | CS-O-40472 | 1820041-19-7 | Enquire |
| N-Methyl Esomeprazole Isomer-2 | Impurities | CS-EO-02127 | 1346240-11-6 | Enquire |
| N-methyl Omeprazole | Impurities | CS-O-03493 | 89352-76-1+784143-42-6 | In Stock |
| N-Methyl Omeprazole (Mixture of isomers with the methylated ... | Impurities | CS-T-82743 | 89352-76-1+784143-42-6 | Enquire |
| N-Nitroso Esomeprazole | Impurities | CS-O-46450 | Not Available | Enquire |
| N-Nitroso Omeprazole EP Impurity I | Impurities | CS-EO-03738 | 158812-85-2 (Freebase) | Enquire |
| N-Nitroso Omeprazole Sulfide | Impurities | CS-O-42660 | Not Available | Enquire |
| O,O-Didesmethyl Omeprazole | Impurities | CS-O-30442 | Not Available | Enquire |
| Omeprazole Acid Methyl Ester Sulfide | Impurities | CS-T-38048 | 120003-82-9 | Enquire |
| Omeprazole dibenzimidazole Impurity | Impurities | CS-O-50933 | 2451927-89-0 | In Stock |
| Omeprazole EP Impurity A | Impurities | CS-O-31075 | 37052-78-1 | In Stock |
| Omeprazole EP impurity B | Impurities | CS-T-16121 | 110374-16-8 | In Stock |
| Omeprazole EP Impurity F | Impurities | CS-EO-00001 | 125656-82-8 | In Stock |
| Omeprazole EP impurity F & G Mixture | Impurities | CS-T-57691 | 125656-82-8+125656-83-9 | In Stock |
| Omeprazole EP Impurity G | Impurities | CS-O-15599 | 125656-83-9 | In Stock |
| Omeprazole EP impurity I | Impurities | CS-O-10088 | 158812-85-2 | In Stock |
| Omeprazole Hydrolysis Impurity | Impurities | CS-O-30490 | 1227380-90-6 (Freebase) | In Stock |
| Omeprazole Hydrolysis Impurity Sodiumsalt | Impurities | CS-O-51448 | Not Available | Enquire |
| Omeprazole Impurity 20 | Impurities | CS-M-25247 | 220770-99-0 | Enquire |
| Omeprazole Impurity 24 | Impurities | CS-EO-02779 | 2451927-87-8 | In Stock |
| Omeprazole Impurity 25 | Impurities | CS-P-08279 | 1346649-67-9 | Enquire |
| Omeprazole Impurity 26 | Impurities | CS-EO-02778 | 2451927-94-7 | Enquire |
| Omeprazole Impurity 53 | Impurities | CS-P-09033 | 73590-87-1 | Enquire |
| Omeprazole Impurity 63 | Impurities | CS-P-09032 | 149367-83-9 | Enquire |
| Omeprazole Impurity 79 | Impurities | CS-P-09103 | 2451927-86-7 | Enquire |
| Omeprazole Impurity 8 | Impurities | CS-EO-01157 | Not Available | Enquire |
| Omeprazole impurity D | Impurities | CS-O-10305 | 88546-55-8 | In Stock |
| Omeprazole Impurity- K | Impurities | CS-DN-00023 | Not Available | Enquire |
| Omeprazole Isomer-2 5-Methoxy -1-[(4-methoxy-3,5-dimethyl-2-... | Impurities | CS-O-45208 | 2101206-41-9 | Enquire |
| Omeprazole N-Methyl 5-Methoxy Analog | Impurities | CS-O-58148 | 89352-76-1 | Enquire |
| Omeprazole O-hydrogen sulfite | Impurities | CS-O-48936 | Not Available | Enquire |
| Omeprazole pyridine impurity | Impurities | CS-O-53630 | Not Available | Enquire |
| Omeprazole Pyridone Acid | Impurities | CS-O-59094 | 1227380-90-6 | Enquire |
| Omeprazole Related Compound 5 | Impurities | CS-P-02452 | 86604-79-7 | In Stock |
| Omeprazole Related Compound 7 | Impurities | CS-P-02230 | 91219-90-8 | In Stock |
| Omeprazole sulfide 5-carboxylic acid | Impurities | CS-BX-00208 | 103877-00-5 | Enquire |
| Omeprazole Sulfide N1-Methyl 5-Methoxy Analog | Impurities | CS-EO-02812 | 2243644-60-0 | Enquire |
| Omeprazole EP Impurity C | Impurities | CS-O-31176 | 73590-85-9 | In Stock |
| Omeprazole-13C, D3 Sulfide | Impurities | CS-F-00177 | 73590-85-9 (unlabelled) | Enquire |
| Omeprazole-13C, D3 Sulfone | Impurities | CS-F-00178 | 1261393-28-5 | Enquire |
| Omeprazole-N-(S)-camphorsulfonamide | Impurities | CS-T-83321 | 869087-33-2 | Enquire |
| o-Toluoyl-5-hydroxy Omeprazole Sulfide | Impurities | CS-T-62132 | 120003-78-3 | Enquire |
EP Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Esomeprazole sodium (Y0002075) | EP Standards | CS-EG-00680 | 161796-78-7 | Enquire |
| Omeprazole (O0150000) | EP Standards | CS-EG-00978 | 73590-58-6 | In Stock |
| Omeprazole for peak identification (Y0001042) | EP Standards | CS-EG-00613 | 73590-58-6 | Enquire |
| Omeprazole impurity D (O0151000) | EP Standards | CS-EG-00983 | 88546-55-8 | In Stock |
Intermediates
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 1-N-Methyl Omeprazole | Intermediates | CS-T-82420 | 784143-42-6 | In Stock |
| 2-(hydroxymethyl)-3,5-dimethylpyridin-4-ol | Intermediates | CS-O-52086 | 727375-13-5 | Enquire |
| 2-Chloromethyl-4-methoxy-3,5-dimethyl pyridine HCL | Intermediates | CS-O-31339 | 86604-75-3 | In Stock |
| 4’-Desmethoxy Omeprazole | Intermediates | CS-T-90105 | 73590-60-0 | In Stock |
| 4-Acetyloxy Omeprazole | Intermediates | CS-T-47348 | 1246814-65-2 | Enquire |
| 5-Benzyloxy Omeprazole | Intermediates | CS-T-06127 | 1215799-39-5 | Enquire |
| 5-Hydroxy Omeprazole | Intermediates | CS-T-27949 | 92340-57-3 | Enquire |
| 5-Hydroxy Omeprazole Sodium Salt | Intermediates | CS-T-28124 | 1215629-45-0 | Enquire |
| Omeprazole Acid Methyl Ester | Intermediates | CS-T-38047 | 120003-83-0 | Enquire |
| Omeprazole Magnesium | Intermediates | CS-O-10930 | 95382-33-5 | Enquire |
| Omeprazole Sulfide Hydrochloride | Intermediates | CS-T-38052 | 220757-75-5 | Enquire |
| o-Toluoyl-5-hydroxy Omeprazole | Intermediates | CS-T-62131 | 120003-79-4 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Esomeprazole (magnesium salt) | Fine Chemicals | CS-ZE-04618 | 1198768-91-0 | Enquire |
| Esomeprazole Impurity 17 | Fine Chemicals | CS-O-34604 | 2572712-50-4 | Enquire |