Parecoxib Impurity 34 CAS CATO-C4X-159134
| CAS No. | CATO-C4X-159134 |
| Molecular Formula | C16H13NO4S |
| Molecular Weight | 315.34 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.
CATO supplies Parecoxib Impurity 34 (CAS CATO-C4X-159134), a pharmacopoeial impurity reference standard (molecular formula C16H13NO4S, MW 315.34 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Parecoxib Impurity 34 (C16H13NO4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 315.34 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C16H13NO4S |
| Molecular Weight | 315.34 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Parecoxib Standards
- Parecoxib Impurity 33 (CAS CATO-C4X-159133)
- Parecoxib Impurity 36 (CAS CATO-C4X-159136)
- Parecoxib Impurity 8 (CAS 181696-35-5)
- Parecoxib Impurity 80 (CAS 3363-92-6)
- 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)
Recommended Standards
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- Sivelestat Impurity 8 (CAS CATO-C4X-21238)
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