Parecoxib sodium Impurity 40 CAS 2235371-89-6
| CAS No. | 2235371-89-6 |
| Molecular Formula | C19H18N2O4S |
| Molecular Weight | 370.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Parecoxib sodium Impurity 40 (C19H18N2O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Parecoxib sodium Impurity 40 (CAS 2235371-89-6) is a certified pharmaceutical impurity reference standard with the molecular formula C19H18N2O4S and a molecular weight of 370.42 g/mol.
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), Parecoxib sodium Impurity 40 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 | C19H18N2O4S |
| Molecular Weight | 370.42 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Parecoxib Standards
- Parecoxib sodium Impurity 10 (CAS 2229657-81-0)
- Parecoxib Impurity 14 (CAS 1709956-89-7)
- Parecoxib Impurity 46 (CAS 477594-28-8)
- Parecoxib (CAS 198470-84-7)
- Parecoxib Impurity 62 (CAS 2304623-36-5)
- Parecoxib Impurity 63 (CAS 2242749-02-4)
- Parecoxib Impurity 71 (CAS 2304623-38-7)
- Parecoxib Impurity 50 (CAS 3026677-40-4)
Recommended Standards
- Pioglitazone impurity 27 (CAS CATO-C4X-138327)
- Pioglitazone Ketone (M-III) (CAS 146062-45-5)
- Sunitinib Impurity 19 (CAS 356068-97-8)
- Sunitinib Impurity 18 (CAS 326914-17-4)
- Posaconazole Impurity 11 (CAS 159811-30-0)
- Barloxavir impurity 100 (CAS CATO-C4X-2108100)
- Lomefloxacin impurity 23 (CAS CATO-C4X-207323)
- 3-(3-Chlorothiophen-2-yl)-1H-pyrazole (CAS 166196-59-4)
- N-(2-methylbenzyl)-1-(pyridin-2-yl)methanamine dihydrochloride (CAS 1252334-11-4)
- (2-(Dimethyl(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)silyl)phenyl)methanol (CAS 947515-75-5)
- Lurasidone Impurity 69 (CAS CATO-C4X-102869)
- 2-(4-Ethyl-3,5-dimethyl-1H-pyrazol-1-yl)propanoic acid (CAS 1217862-44-6)
- 3-Chloro-4-(3,5-dimethylphenoxy)aniline (CAS 893750-61-3)
- Neuropeptide Y, porcine (CAS 82785-45-3)
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