Esomeprazole impurity 133 CAS CATO-C4X-1112133
| CAS No. | CATO-C4X-1112133 |
| Molecular Formula | C18H13NO2S2 |
| Molecular Weight | 339.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Esomeprazole impurity 133 (C18H13NO2S2) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 339.43 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO supplies Esomeprazole impurity 133 (CAS CATO-C4X-1112133), a pharmacopoeial impurity reference standard (molecular formula C18H13NO2S2, MW 339.43 g/mol) used for the identification and quantification of trace impurities in APIs.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Esomeprazole impurity 133 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H13NO2S2 |
| Molecular Weight | 339.43 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
Related Esomeprazole Standards
- Esomeprazole Impurity 128 (CAS CATO-C4X-1112128)
- Esomeprazole Impurity 129 (CAS CATO-C4X-1112129)
- Esomeprazole Impurity 136 (CAS 2561418-28-6)
- Esomeprazole EP Impurity F (CAS 119141-89-8)
- EsoMeprazole (CAS 119141-88-7)
- Esomeprazole Impurity 119 (CAS CATO-C4X-1112119)
- Esomeprazole Impurity 120 (CAS 358675-51-1)
- Esomeprazole Impurity 17 (CAS 151602-49-2)
Recommended Standards
- Ibuprofen Impurity 84 (CAS CATO-C4X-108284)
- Salbutamol Impurity 124 (CAS CATO-C4X-1176124)
- Saxagliptin Impurity 86 (CAS CATO-C4X-104986)
- Bisoprolol EP Impurity K (CAS 864544-37-6)
- Brivaracetam Impurity 207 (CAS CATO-C4X-2007207)
- Ibuprofen EP Impurity F (CAS 65322-85-2)
- Carbamazepine Impurity 39 (CAS 53003-61-5)
- 2-(2-Methoxy-4-(trifluoromethoxy)phenyl)acetonitrile (CAS 886500-40-9)
- 4-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-2-fluoro-5-methoxybenzoic acid (CAS 2243516-10-9)
- Ethyl 2-(methylsulfanyl)-4-[3-(2,4,5-trichlorobenzenesulfonamido)phenoxy]pyrimidine-5-carboxylate (CAS 478065-46-2)
- 2-(Chloromethyl)-4,5-dimethyl-3,6-dihydro-2h-pyran (CAS 98559-77-4)
- Ethyl 5-amino-6-iodo-3-methoxypicolinate (CAS 872355-73-2)
- 6-Benzyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine-2,4(1H,3H)-dione (CAS 135481-57-1)
- Semaglutide Impurity 186 (CAS CATO-C4X-2226186)
Why CATO?
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