Imrecoxib Impurity 67 CAS CATO-C4X-237967
| CAS No. | CATO-C4X-237967 |
| Molecular Formula | C21H25NO4S |
| Molecular Weight | 387.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Imrecoxib Impurity 67 (CAS CATO-C4X-237967) is a certified pharmaceutical impurity reference standard with the molecular formula C21H25NO4S and a molecular weight of 387.49 g/mol.
The molecular framework of Imrecoxib Impurity 67 (C21H25NO4S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C21H25NO4S |
| Molecular Weight | 387.49 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Imrecoxib Standards
- Imrecoxib Impurity 26 (CAS 2305368-54-9)
- Imrecoxib Impurity 48（Z-isomer） (CAS CATO-C4X-237948)
- Imrecoxib Impurity 52（Z-Isomer） (CAS CATO-C4X-237952)
- Imrecoxib Impurity 79 (CAS CATO-C4X-237979)
- Imrecoxib Impurity 81 (E-Isomer) (CAS CATO-C4X-237981)
- Imrecoxib Impurity 11 (CAS 896729-07-0)
- Imrecoxib Impurity 92 (CAS CATO-C4X-23792)
- Imrecoxib Impurity 53 (CAS 3038592-00-3)
Recommended Standards
- Aprepitant impurity 35 (CAS 395683-22-4)
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- Lenvatinib Impurity 11 (CAS 2613141-84-5)
- Ruxolitinib Impurity 239 (CAS CATO-C4X-2058239)
- Ivabradine Impurity 22 (CAS 1428869-91-3)
- 2-(4-fluorophenyl)-2-(methylamino)acetic acid (CAS 689254-66-8)
- Propan-2-yl 5-bromo-2-fluorobenzoate (CAS 1369403-80-4)
- (1R,4R)-N-Ethyl-N-(4-methylamino-cyclohexyl)-acetamide (CAS 1354002-03-1)
- Propan-2-yl 3-phenyl-5-(propan-2-yloxy)-1,2,4-triazine-6-carboxylate (CAS 338956-98-2)
- (1E)-1-(5-Chloro-1-methyl-3-phenyl-1H-pyrazol-4-yl)-N-(4-chlorophenyl)methanimine (CAS 320422-65-9)
- (S)-Methyl 2-amino-2-(3-bromophenyl)acetate hydrochloride (CAS 1391457-11-6)
- Osteoblast Activating Peptide (mouse, rat) (H-7262.0500) (CAS 1222950-80-2)
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