Cefminox Impurity 16 CAS CATO-C4X-192616
| CAS No. | CATO-C4X-192616 |
| Molecular Formula | C16H21N3O9S2 |
| Molecular Weight | 463.48 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Cefminox Impurity 16 (CAS CATO-C4X-192616) is a certified pharmaceutical impurity reference standard with the molecular formula C16H21N3O9S2 and a molecular weight of 463.48 g/mol.
Cefminox Impurity 16 (C16H21N3O9S2) 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).
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 | C16H21N3O9S2 |
| Molecular Weight | 463.48 g/mol |
| Purity | >90% |
| Storage | Store in a cool place (≤25°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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 2 |
Related Cefminox Standards
- Cefminox Impurity 31 (CAS CATO-C4X-192631)
- Cefminox Impurity 49 (CAS CATO-C4X-192649)
- Cefminox Impurity 28 (CAS CATO-C4X-192628)
- Cefminox Impurity 5 (CAS CATO-C4X-19265)
- Cefminox Impurity 48 (CAS CATO-C4X-192648)
- Cefminox Sodium Impurity 20 (CAS 57617-09-1)
- Cefminox Impurity 4 (CAS CATO-C4X-19264)
- Cefminox Impurity 40 (CAS CATO-C4X-192640)
Recommended Standards
- tert-Butyl 4-(4-amino-5-(2,3-difluoro-6-methoxybenzoyl)pyrimidin-2-ylamino)piperidine-1-carboxylate (CAS 741713-41-7)
- Lenalidomide-PEG3-C2-acid (CAS 2399454-54-5)
- Tegoprazan Impurity 109 (CAS CATO-C4X-2297109)
- Galanthamine β-D-Glucuronide (CAS 464189-56-8)
- Promethazine Impurity 48 (CAS CATO-C4X-141848)
- Dopamine Impurity 49 (CAS 3166-74-3)
- Proparacaine Impurity 5 HCl (CAS CATO-C4X-202732)
- Benzyl 4-bromobutanoate (CAS 126430-46-4)
- (2R,4R)-4-Amino-1-benzylpyrrolidine-2,4-dicarboxylic acid hydrochloride (CAS 345296-09-5)
- 5-Ethyl-N-(2-isobutyryl-1,2,3,4-tetrahydroisoquinolin-7-yl)thiophene-2-sulfonamide (CAS 955720-99-7)
- N-((1-(p-Tolyl)-1H-tetrazol-5-yl)methyl)cyclohexanecarboxamide (CAS 921073-83-8)
- 1-(4-Aminopiperidin-1-yl)butan-2-ol (CAS 1183757-80-3)
- 1,2-Dihydro-3H-cyclopenta[a]naphthalen-3-one (CAS 5838-88-0)
- Semaglutide impurity 49 (CAS CATO-C4X-222649)
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