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 |
|---|---|---|---|---|
| 5-Hydroxy Acetate Omeprazole-d3 | Stable Isotopes | CS-T-99223 | Not Available | Enquire |
| 5-Hydroxy Omeprazole-d3 Sodium Salt | Stable Isotopes | CS-T-99211 | Not Available | Enquire |
| Esomeprazole D3 (benzo[d]imidazole-D3) | Stable Isotopes | CS-P-08296 | 119141-88-7 (Unlabelled) | Enquire |
| Esomeprazole-D6 | Stable Isotopes | CS-N-05240 | 922800-06-4 | Enquire |
| Esomeprazole-d3 (methoxy-d3) | Stable Isotopes | CS-T-94459 | 2182068-27-3 | Enquire |
| 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-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 sulfide-(4-methoxy-D3-Pyridine) | Stable Isotopes | CS-T-59944 | 922731-00-8 | Enquire |
| Omeprazole-13C, D3 Sulfide | Stable Isotopes | CS-F-00177 | 73590-85-9 (unlabelled) | Enquire |
| Omeprazole-13C, D3 Sulfone | Stable Isotopes | CS-F-00178 | 1261393-28-5 | Enquire |
| Omeprazole-13C, D3 Sulfone N-Oxide | Stable Isotopes | CS-F-00179 | 158812-85-2 (unlabelled) | Enquire |
| Omeprazole-13C,d3 | Stable Isotopes | CS-O-03017 | 1261395-28-1 | In Stock |
| 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 sodium | Stable Isotopes | CS-O-46956 | 95510-70-6(Unlabelled) | Enquire |
| Omeprazole-D3 Sulfone N-Oxide | Stable Isotopes | CS-F-00058 | 2748468-58-6 | Enquire |
| S-Deoxy-5-Hydroxy Acetate Omeprazole-d3 | Stable Isotopes | CS-T-102762 | Not Available | Enquire |
| 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-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 Sodium D3 | Stable Isotopes | CS-O-06832 | 161796-78-7(Unlabeled) | Enquire |
| Esomeprazole Sodium D6 | Stable Isotopes | CS-O-06833 | 922731-04-2 | 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 |
| Omeprazole Acid-d3 Methyl Ester Sulfide | Stable Isotopes | CS-T-83258 | 1329797-04-7 | Enquire |
| Omeprazole D12 | Stable Isotopes | CS-O-34537 | Not Available | Enquire |
| Omeprazole D13 | Stable Isotopes | CS-O-34559 | Not Available | Enquire |
| Omeprazole D15 | Stable Isotopes | CS-O-34560 | Not Available | 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-(5-methoxy-d3) | Stable Isotopes | CS-T-83658 | 922730-98-1 | Enquire |
| Omeprazole Sulfide-13C | Stable Isotopes | CS-F-00055 | Not Available | Enquire |
| Omeprazole sulfone D3 | Stable Isotopes | CS-O-10447 | 1189891-71-1 | Enquire |
| Omeprazole-13C | Stable Isotopes | CS-F-00056 | Not Available | Enquire |
| Omeprazole-4-methoxy D3 | Stable Isotopes | CS-T-59942 | 922731-10-0 | Enquire |
| o-Toluoyl-5-hydroxy Omeprazole Sulfide-d3 | Stable Isotopes | CS-T-86727 | 1276635-87-0 | Enquire |
API
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Esomeprazole | API | CS-ED-02296 | 119141-88-7 | In Stock |
| Esomeprazole Magnesium | API | CS-O-30905 | 161973-10-0 | In Stock |
| Esomeprazole magnesium dihydrate | API | CS-O-04263 | 217087-10-0 | In Stock |
| Esomeprazole magnesium trihydrate | API | CS-DO-00013 | 217087-09-7 | In Stock |
| Esomeprazole sodium | API | CS-O-01460 | 161796-78-7 | In Stock |
| Omeprazole Sodium | API | CS-O-04924 | 95510-70-6 | In Stock |
| Esomeprazole potassium | API | CS-BU-00007 | 161796-84-5 | Enquire |
| Omeprazole Pellets | API | CS-DT-00032 | Not Available | Enquire |
Metabolite
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (S)-Omeprazole desmethyl impurity | Metabolite | CS-O-47749 | Not Available | Enquire |
| 4-Desmethoxy Omeprazole Sulfide | Metabolite | CS-T-16123 | 704910-89-4 | In Stock |
| 4-Hydroxy Omeprazole Sulfide | Metabolite | CS-T-28117 | 103876-98-8 | In Stock |
| 5-O-Desmethyl Omeprazole | Metabolite | CS-T-16364 | 151602-49-2 | In Stock |
| Omeprazole acid sodium salt | Metabolite | CS-O-30491 | 120003-84-1 | In Stock |
| Omeprazole N-Oxide | Metabolite | CS-O-07977 | 176219-04-8 | In Stock |
| 4-Hydroxy Omeprazole | Metabolite | CS-T-28123 | 301669-82-9 | Enquire |
| 5-Hydroxy Esomeprazole | Metabolite | CS-O-32554 | 19648-27-7 | Enquire |
Impurity
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (R) Omeprazole Potassium Salt | Impurity | CS-EO-03737 | 161796-81-2 | Enquire |
| 2-((5-Methoxy-1H-benzo[d]imidazol-2-yl)methyl)-3,5-dimethylp... | Impurity | CS-O-43276 | Not Available | Enquire |
| 3,4-Diaminoanisole | Impurity | CS-T-16825 | 102-51-2 | In Stock |
| 3-Hydroxyomeprazole | Impurity | CS-ED-02054 | 176219-02-6 | Enquire |
| 4-Desmethoxy-4-chloro Omeprazole | Impurity | CS-T-16106 | 863029-89-4 | In Stock |
| 4-Desmethoxy-4-chloro Omeprazole Sulfide | Impurity | CS-T-16108 | 220757-74-4 | In Stock |
| 4-Desmethoxy-4-nitro Omeprazole | Impurity | CS-T-16114 | 317807-10-6 | In Stock |
| 6-Methoxy-2-(4-methoxy-3,5-dimethyl-2-pyridinyl)-1H-benzimid... | Impurity | CS-O-46125 | 2555002-22-5 | Enquire |
| 6-methoxy-N-alkyl omeprazole sulphide | Impurity | CS-O-44854 | Not Available | Enquire |
| desmethoxy Esomeprazole impuruty | Impurity | CS-O-42902 | 1432904-84-1 (freebase) | Enquire |
| Desulfoxide 4-Demethyl Omeprazole | Impurity | CS-T-88918 | 1384163-92-1 | Enquire |
| Esomeprazole dihydropyridin methanesulfinicacid | Impurity | CS-O-51834 | ---- | Enquire |
| Esomeprazole EP Impurity B | Impurity | CS-T-38031 | 119141-89-8 | In Stock |
| Esomeprazole Ether Impurity | Impurity | CS-O-46649 | Not Available | Enquire |
| Esomeprazole Impurity 12 | Impurity | CS-P-08592 | 2101206-66-8 | In Stock |
| Esomeprazole Impurity 13 | Impurity | CS-EO-03541 | 143016-67-5 | Enquire |
| Esomeprazole Impurity 16 | Impurity | CS-O-46323 | 848696-99-1 | Enquire |
| Esomeprazole Impurity 17 | Impurity | CS-O-34604 | 2572712-50-4 | Enquire |
| Esomeprazole Impurity 2 | Impurity | CS-O-35962 | 2512216-37-2 | Enquire |
| Esomeprazole Impurity 24 | Impurity | CS-O-53631 | 2451927-93-6 | Enquire |
| Esomeprazole Impurity 3 | Impurity | CS-O-35960 | 2819805-13-3 | Enquire |
| Esomeprazole Impurity 4 | Impurity | CS-O-35386 | 1831938-48-7 | Enquire |
| Esomeprazole Impurity 5 | Impurity | CS-P-09014 | Not Available | Enquire |
| N-(4-Methoxy-3,5-dimethyl-2-pyridinyl)methyl Omeprazole | Impurity | CS-T-80106 | 1346599-85-6 | In Stock |
| N-Methyl Esomeprazole Isomer-1 | Impurity | CS-EO-02126 | 1820041-19-7 | Enquire |
| N-Methyl Esomeprazole Isomer-2 | Impurity | CS-EO-02127 | 1346240-11-6 | Enquire |
| N-methyl Omeprazole | Impurity | CS-O-03493 | 89352-76-1+784143-42-6 | In Stock |
| Omeprazole dibenzimidazole Impurity | Impurity | CS-O-50933 | 2451927-89-0 | In Stock |
| Omeprazole Dihydroxy methyl impurity | Impurity | CS-O-52064 | Not Available | Enquire |
| Omeprazole Dimer Impurity | Impurity | CS-O-35744 | Not Available | Enquire |
| Omeprazole EP Impurity A | Impurity | CS-O-31075 | 37052-78-1 | In Stock |
| Omeprazole EP impurity B | Impurity | CS-T-16121 | 110374-16-8 | In Stock |
| Omeprazole EP Impurity D | Impurity | CS-O-10305 | 88546-55-8 | In Stock |
| Omeprazole EP Impurity F | Impurity | CS-EO-00001 | 125656-82-8 | In Stock |
| Omeprazole EP impurity F & G Mixture | Impurity | CS-T-57691 | 125656-82-8+125656-83-9 | In Stock |
| Omeprazole EP Impurity G | Impurity | CS-O-15599 | 125656-83-9 | In Stock |
| Omeprazole EP impurity I | Impurity | CS-O-10088 | 158812-85-2 | In Stock |
| Omeprazole Hydrolysis Impurity | Impurity | CS-O-30490 | 1227380-90-6 (Freebase) | Enquire |
| Omeprazole Hydrolysis Impurity Sodiumsalt | Impurity | CS-O-51448 | Not Available | Enquire |
| Omeprazole impurity (DIMER Mixture) | Impurity | CS-O-43334 | Not Available | Enquire |
| Omeprazole Impurity 20 | Impurity | CS-M-25247 | 220770-99-0 | Enquire |
| Omeprazole Impurity 24 | Impurity | CS-EO-02779 | 2451927-87-8 | In Stock |
| Omeprazole Impurity 26 | Impurity | CS-EO-02778 | 2451927-94-7 | Enquire |
| Omeprazole Impurity 47 | Impurity | CS-O-60241 | ---- | Enquire |
| Omeprazole Impurity 60 | Impurity | CS-ED-02436 | Not Available | Enquire |
| Omeprazole Impurity 79 | Impurity | CS-P-09103 | 2451927-86-7 | Enquire |
| Omeprazole Impurity 8 | Impurity | CS-EO-01157 | Not Available | Enquire |
| Omeprazole Isomer-2 5-Methoxy -1-[(4-methoxy-3,5-dimethyl-2-... | Impurity | CS-O-45208 | 2101206-41-9 | Enquire |
| Omeprazole N-Methyl 5-Methoxy Analog | Impurity | CS-O-58148 | 89352-76-1 | Enquire |
| Omeprazole O-hydrogen sulfite | Impurity | CS-O-48936 | ---- | Enquire |
| Omeprazole oxa impurity | Impurity | CS-O-45782 | 2451927-88-9 | Enquire |
| Omeprazole pyridine impurity | Impurity | CS-O-53630 | ---- | Enquire |
| Omeprazole Pyridone Acid Ammonium | Impurity | CS-O-60407 | 2227107-89-1 | Enquire |
| Omeprazole Related Compound 5 | Impurity | CS-P-02452 | 86604-79-7 | In Stock |
| Omeprazole Related Compound 7 | Impurity | CS-P-02230 | 91219-90-8 | In Stock |
| Omeprazole Sulfide N1-Methyl 5-Methoxy Analog | Impurity | CS-EO-02812 | 2243644-60-0 | Enquire |
| Omeprazole EP Impurity C | Impurity | CS-O-31176 | 73590-85-9 | In Stock |
| (2-[2-(5-Methoxy-1H-benzoimidazol-2-yl)-ethyl]-3-5-dimethyl-... | Impurity | CS-O-41638 | Not Available | Enquire |
| (S)-5-Hydroxy Omeprazole | Impurity | CS-T-79065 | 196489-27-7 | Enquire |
| 2-((5-methoxy-1H benzo(d)imidazol-2-ylthio)methyl)-3,5 dimet... | Impurity | CS-O-36541 | Not Available | Enquire |
| 2-(5-Methoxy-1H-benzimidazole-2-ylmethyl)-3,5 dimethyl-1H-py... | Impurity | CS-O-36542 | 1384163-92-1 | Enquire |
| 4,5’-Di(desmethyl) Omeprazole Sulfide | Impurity | CS-T-90600 | 176219-12-8 | Enquire |
| 4-Acetyloxy Omeprazole Sulfide | Impurity | CS-T-47058 | 1359829-71-2 | Enquire |
| 4-Acetyloxy Omeprazole Sulfone | Impurity | CS-T-64306 | 1391054-80-0 | Enquire |
| 4-Desmethoxy-4-chloro Omeprazole N-Oxide | Impurity | CS-T-89692 | 213476-14-3 | Enquire |
| 4-Desmethoxy-4-nitro Omeprazole Sulfide | Impurity | CS-T-16115 | 142885-91-4 | Enquire |
| 4-Desmethoxy-4-nitro Omeprazole Sulfone | Impurity | CS-T-52188 | 1076199-93-3 | Enquire |
| 4-Hydroxy Omeprazole Sulfone | Impurity | CS-T-28146 | 1346600-70-1 | Enquire |
| 4-Methoxy-3,5-dimethylpyridine 1-Oxide | Impurity | CS-T-32327 | 91219-89-5 | Enquire |
| 5-Hydroxy Omeprazole Sulfide | Impurity | CS-T-57713 | 103876-99-9 | Enquire |
| 5-Hydroxyomeprazole sulfone | Impurity | CS-BX-00206 | 151602-51-6 | Enquire |
| 5-O-Desmethyl Omeprazole Sulfide | Impurity | CS-T-16371 | 103877-02-7 | Enquire |
| Bis-Desmethoxy Omeprazole Sulfide | Impurity | CS-EO-01878 | 704910-94-1 | Enquire |
| Des-Methoxy Esomeprazole | Impurity | CS-EO-01879 | 704910-88-3 | Enquire |
| Esomeprazole Impurity 1 | Impurity | CS-O-11885 | Not Available | Enquire |
| Esomeprazole impurity J | Impurity | CS-AQ-00199 | Not Available | Enquire |
| N-(4-Methoxy-3,5-dimethyl-2-pyridinyl)methyl Omeprazole Sulf... | Impurity | CS-T-81597 | 1346599-74-3 | Enquire |
| N-Methyl Esomeprazole (Mixture of isomers with the methylate... | Impurity | CS-T-93421 | 1820041-19-7 and 1346240-11-6 | Enquire |
| N-Methyl Esomeprazole Sodium | Impurity | CS-O-53717 | ---- | Enquire |
| N-Methyl Omeprazole (Mixture of isomers with the methylated ... | Impurity | CS-T-82743 | 89352-76-1+784143-42-6 | Enquire |
| O,O-Didesmethyl Omeprazole | Impurity | CS-O-30442 | Not Available | Enquire |
| Omeprazole Acid Methyl Ester Sulfide | Impurity | CS-T-38048 | 120003-82-9 | Enquire |
| Omeprazole Impurity 25 | Impurity | CS-P-08279 | 1346649-67-9 | Enquire |
| Omeprazole Impurity 30 | Impurity | CS-P-08991 | Not Available | Enquire |
| Omeprazole Impurity 53 | Impurity | CS-P-09033 | 73590-87-1 | Enquire |
| Omeprazole Impurity 63 | Impurity | CS-P-09032 | 149367-83-9 | Enquire |
| Omeprazole Impurity- K | Impurity | CS-DN-00023 | Not Available | Enquire |
| Omeprazole sulfide 5-carboxylic acid | Impurity | CS-BX-00208 | 103877-00-5 | Enquire |
| Omeprazole-N-(S)-camphorsulfonamide | Impurity | CS-T-83321 | 869087-33-2 | Enquire |
| o-Toluoyl-5-hydroxy Omeprazole Sulfide | Impurity | CS-T-62132 | 120003-78-3 | Enquire |
Intermediate
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 1H-Benzo imidazole-2-thiol | Intermediate | CS-O-31883 | 583-39-1 | In Stock |
| 1-N-Methyl Omeprazole | Intermediate | CS-T-82420 | 784143-42-6 | In Stock |
| 2-(hydroxymethyl)-3,5-dimethylpyridin-4-ol | Intermediate | CS-O-52086 | 727375-13-5 | Enquire |
| 2,3-Dimethylpyridine | Intermediate | CS-DA-00539 | 583-61-9 | In Stock |
| 2-Chloromethyl-4-methoxy-3,5-dimethyl pyridine HCL | Intermediate | CS-O-31339 | 86604-75-3 | In Stock |
| 4’-Desmethoxy Omeprazole | Intermediate | CS-T-90105 | 73590-60-0 | In Stock |
| Omeprazole Pellets 13.4% Placebo | Intermediate | CS-O-51213 | Not Available | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 3,5-Dimethyl-4-nitropyridine 1-Oxide | Fine Chemicals | CS-T-93432 | 14248-66-9 | In Stock |
| Esomeprazole (magnesium salt) | Fine Chemicals | CS-ZE-04618 | 1198768-91-0 | Enquire |
Nitrosamine
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| N-Nitroso Esomeprazole | Nitrosamine | CS-O-46450 | Not Available | Enquire |
| N-Nitroso Esomeprazole Impurity A | Nitrosamine | CS-O-42659 | ---- | Enquire |
| N-Nitroso Omeprazole EP Impurity I | Nitrosamine | CS-EO-03738 | 158812-85-2 (Freebase) | Enquire |
| N-Nitroso Omeprazole sodium | Nitrosamine | CS-O-38858 | Not Available | Enquire |
| N-Nitroso Omeprazole Sulfide | Nitrosamine | CS-O-42660 | Not Available | Enquire |
Secondary Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2-[[(4-Chloro-3,5-dimethyl-2-pyridinyl)methyl]thio]-6-methox... | Secondary Standards | CS-SS-26445 | 220757-74-4 | Enquire |
| Esomeprazole Magnesium | Secondary Standards | CS-SS-24557-1GM | 217087-09-7 | Enquire |
| N?-Methyl Omeprazole | Secondary Standards | CS-SS-24882-30MG | 89352-76-1 | Enquire |
| Omeprazole Impurity B | Secondary Standards | CS-SS-24913-30MG | 110374-16-8 | Enquire |
| Omeprazole Impurity C | Secondary Standards | CS-SS-24914-30MG | 73590-85-9 | Enquire |
| Omeprazole Impurity H | Secondary Standards | CS-SS-24915-30MG | 863029-89-4 | Enquire |
| Omeprazole Related Compound A | Secondary Standards | CS-SS-24610-30MG | 88546-55-8 | Enquire |
| Omeprazole Related Compound B | Secondary Standards | CS-SS-24912-30MG | 37052-78-1 | Enquire |
| Omeprazole Related Compound E | Secondary Standards | CS-SS-24611-30MG | 176219-04-8 | Enquire |
| Omeprazole Related Compound I | Secondary Standards | CS-SS-24612-30MG | Not Available | Enquire |
Stable Isotope Reagent
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Omeprazole-d3 Sulfone (benzimidazole-4,6,7-d3) | Stable Isotope Reagent | CS-C-01506 | 88546-55-8 (Unlabelled) | Enquire |
Chiral
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (R)-Omeprazole Sodium | Chiral | CS-O-11179 | 161796-77-6 | In Stock |
EP Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| omeprazole for peak identification (containing impurity E) | EP Standards | CS-EG-03458 | ---- | Enquire |
Therapeutic
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Omeprazole | Therapeutic | CS-O-10304 | 73590-58-6 | In Stock |