Etoricoxib Impurity 93 CAS CATO-C4X-108093
| CAS No. | CATO-C4X-108093 |
| Molecular Formula | C22H21NO4S |
| Molecular Weight | 395.47 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Etoricoxib Impurity 93 (C22H21NO4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a process- or degradation-related impurity, Etoricoxib Impurity 93 (CAS CATO-C4X-108093, C22H21NO4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
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.
Physical & Chemical Properties
| Molecular Formula | C22H21NO4S |
| Molecular Weight | 395.47 g/mol |
| Purity | ≥95% |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Etoricoxib Standards
- Etoricoxib Impurity 89 (CAS CATO-C4X-108089)
- Etoricoxib Impurity 31 (CAS 2724840-93-9)
- Etoricoxib Impurity 30 (CAS 349536-39-6)
- Etoricoxib Impurity 51 (CAS CATO-C4X-108051)
- Etoricoxib Impurity 32 (CAS 1421227-97-5)
- Etoricoxib Impurity 19 (CAS 646459-41-8)
- Etoricoxib Impurity 85 (CAS CATO-C4X-108085)
- Etoricoxib Impurity 10 (CAS 349536-41-0)
Recommended Standards
- Ixazomib Impurity 16 (CAS CATO-C4X-126716)
- Spiperone (CAS 749-02-0)
- Ixazomib Impurity 17 (CAS CATO-C4X-126717)
- N-(2,6-Dimethylphenyl)-2-[(phenylsulfonyl)(2-pyridinyl)amino]acetamide (CAS 337922-56-2)
- Sivelestat sodium Impurity 1 (CAS 5973-34-2)
- Neostigmine impurity 46 (CAS CATO-C4X-204246)
- Sacubitril Impurity 33 (CAS CATO-C4X-280933)
- 1-Benzhydryl-4-((4-chlorophenyl)sulfonyl)piperazine (CAS 312282-53-4)
- 3-(Morpholin-4-yl)-4H-chromen-4-one (CAS 40302-80-5)
- Metofluthrin (CAS 240494-70-6)
- 1-(4-Bromo-3,5-dimethyl-1H-pyrazol-1-yl)propan-2-ol (CAS 1249695-94-0)
- Perindopril Impurity 117 (CAS 19522-25-9)
- 1-Isopropyl-3-(1-(2-methoxyethyl)-1H-indol-3-yl)urea (CAS 922874-28-0)
- Semaglutide impurity 85 (CAS CATO-C4X-222685)
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