Parecoxib Impurity 73 CAS CATO-C4X-159173
| CAS No. | CATO-C4X-159173 |
| Molecular Formula | C20H21NO |
| Molecular Weight | 291.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Parecoxib Impurity 73 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.
Parecoxib Impurity 73 (CAS CATO-C4X-159173) is a certified pharmaceutical impurity reference standard with the molecular formula C20H21NO and a molecular weight of 291.39 g/mol.
Parecoxib Impurity 73 (C20H21NO) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C20H21NO |
| Molecular Weight | 291.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Parecoxib Standards
- Parecoxib Impurity 15 (CAS 386273-25-2)
- Parecoxib Impurity 2 (CAS 181695-72-7)
- Parecoxib Impurity 3 (CAS CATO-C4X-15913)
- Parecoxib Impurity 32 (CAS 181696-12-8)
- Parecoxib Impurity 47 (CAS 181695-84-1)
- Parecoxib Impurity 51 (CAS 2304623-35-4)
- Parecoxib Impurity 52 (CAS 2304623-37-6)
- Parecoxib Impurity 6 (CAS CATO-C4X-15916)
Recommended Standards
- Dapoxetine Impurity 26 (CAS 147199-39-1)
- Cyclobenzaprine Impurity 5 (CAS 6682-26-4)
- Pregabalin Impurity 138 (CAS 930585-94-7)
- Cyclobenzaprine Impurity 9 (CAS CATO-C4X-15999)
- Rocuronium Impurity 37 (CAS 13492-57-4)
- Regadenoson Impurity 8 (CAS 15763-11-8)
- Rosuvastatin EP Impurity D (CAS 503610-43-3)
- dimethyl3-(benzyloxy)-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridine-2,5-dicarboxylate (CAS 1357289-08-7)
- (R)-Methyl 3-(4-hydroxy-6-oxo-1,6-dihydropyrimidin-5-yl)butanoate (CAS 1245646-90-5)
- 2,4,6-Tribromophenyl 3,4-dibromoperfluorobutanoate (CAS 124311-21-3)
- Sodium (9Z,12Z,15Z)-octadeca-9,12,15-trienoate (CAS 822-18-4)
- 3-Bromo-1'-phenyl-9H,9'H-1,4'-bicarbazole (CAS 1956386-09-6)
- 6-Bromo-8-methoxy-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 943995-18-4)
- Semaglutide impurity 29 (CAS CATO-C4X-222629)
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