Omeprazole acid methyl ester, 98% CAS 120003-83-0
| CAS No. | 120003-83-0 |
| Molecular Formula | C18H19N3O5S |
| Molecular Weight | 389.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Omeprazole acid methyl ester, 98%.
CATO supplies Omeprazole acid methyl ester, 98% (CAS 120003-83-0), a certified reference material (molecular formula C18H19N3O5S, MW 389.43 g/mol) for analytical method development and quality control.
Based on its molecular formula C18H19N3O5S, Omeprazole acid methyl ester, 98% contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 389.43 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C18H19N3O5S |
| Molecular Weight | 389.43 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Omeprazole Standards
- Omeprazole EP Impurity I (CAS 158812-85-2)
- Omeprazole Impurity 33 (CAS CATO-C4X-125533)
- Omeprazole impurity 32 (CAS CATO-C4X-125532)
- Omeprazole acid methyl ester sulfide (CAS 120003-82-9)
- Omeprazole Impurity 50 (CAS CATO-C4X-125550)
- Omeprazole Acid Impurity (CAS 120003-72-7)
- Omeprazole Sulfone-D3 (CAS 1189891-71-1)
- Omeprazole Impurity 11 (CAS CATO-C4X-125511)
Recommended Standards
- 4-((4-(6-(1H-Imidazol-1-yl)pyrimidin-4-yl)piperazin-1-yl)sulfonyl)-3,5-dimethylisoxazole (CAS 1172469-06-5)
- Cefprozil Impurity N1(Z-Cefprozil) (CAS 121412-77-9)
- (E)-N-(4-(2-(((3-hydroxy-1-oxo-1H-inden-2-yl)methylene)amino)thiazol-4-yl)phenyl)acetamide (CAS 1024569-68-3)
- (4-ETHANESULFONYL-2,5-DIMETHYL-3-OXAZOL-2-YL-PHENYL)-(5-HYDROXY-1-METHYL-1H-PYRAZOL-4-YL)-METHANONE (CAS 1231550-52-9)
- 3,5-Dibromo-4-fluorophenacyl chloride (CAS 1807057-04-0)
- [2-(dimethylamino)ethyl](2-methoxyethyl)amine (CAS 819813-93-9)
- 1,16-Difluorohexadecane (CAS 408-41-3)
- tert-Butyl Dibromoacetate (CAS 69713-21-9)
- 2-(4-(Benzyloxy)-2-chlorophenyl)-5,5-dimethyl-1,3,2-dioxaborinane (CAS 2096997-57-6)
- 4-Fluoro-2-(morpholinomethyl)phenylboronic Acid Pinacol Ester Hydrochloride (CAS 2096340-34-8)
- 1-(2-(3-Fluorophenyl)thiazol-5-yl)ethan-1-one (CAS 1247418-31-0)
- 5-Chloro-3-methyl-2-(o-tolyl)pyridine (CAS 2624417-46-3)
- 1-(Piperidin-4-ylmethyl)pyrrolidin-2-one (CAS 139726-90-2)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com