Celecoxib Impurity 42 CAS CATO-C4X-104342
| CAS No. | CATO-C4X-104342 |
| Molecular Formula | C17H14F3N3O2S |
| Molecular Weight | 381.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C17H14F3N3O2S, Celecoxib Impurity 42 contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 381.37 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Celecoxib Impurity 42 (CAS CATO-C4X-104342) is a certified pharmaceutical impurity reference standard with the molecular formula C17H14F3N3O2S and a molecular weight of 381.37 g/mol.
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.
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 | C17H14F3N3O2S |
| Molecular Weight | 381.37 g/mol |
| Purity | >95% |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Celecoxib Standards
- Celecoxib (CAS 169590-42-5)
- Celecoxib EP Impurity A (CAS 170570-01-1)
- Celecoxib EP Impurity B (CAS 331943-04-5)
- Celecoxib Impurity 8 (CAS 170569-99-0)
- Celecoxib Impurity 48 (CAS 921617-76-7)
- Celecoxib Impurity 12 (CAS 1061214-09-2)
- Celecoxib Impurity 26 (Mixture of Z and E Isomers) (CAS CATO-C4X-104326)
- Celecoxib-d4 (CAS 544686-20-6)
Recommended Standards
- 1-(4-Nitrophenyl)-3-(p-tolyl)indeno[1,2-c]pyrazol-4(1H)-one (CAS 1024118-12-4)
- 4-Nitrophenyl 4-6-cyclohexylidene-β-D-mannopyranoside (CAS 102717-16-8)
- N-Dodecyl-2,2,3,3,4,4,4-heptafluorobutanamide (CAS 2284-51-7)
- N-(2-(Benzo[d][1,3]dioxol-5-yl)ethyl)-3-(4-hydroxy-1-oxophthalazin-2(1H)-yl)propanamide (CAS 1061937-33-4)
- Febuxostat impurity 37 (CAS 1229019-33-3)
- Lenvatinib Impurity 87 (CAS CATO-C4X-114087)
- Lopinavir EP Impurity D (CAS CATO-C4X-16824)
- 5-(Hydroxymethyl)-4-(pyridin-3-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione (CAS 1508001-08-8)
- tert-butyl N-[4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)phenyl]carbamate (CAS 120642-87-7)
- Trimethylenesulfide (CAS 287-27-4)
- 1,3-Bis(4-methoxyphenyl)-2-propylpropane-1,3-dione (CAS 263717-49-3)
- tert-Butyl 2,4-dichloro-5H-pyrrolo[3,2-d]pyrimidine-5-carboxylate (CAS 1402148-73-5)
- 4-(Ethoxymethylthio)phenylboronic acid (CAS 2096331-89-2)
- Semaglutide impurity 249 (CAS CATO-C4X-2226249)
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