Ceftiofur Impurity 21 CAS CATO-C4X-158121
| CAS No. | CATO-C4X-158121 |
| Molecular Formula | C24H19N5O9S3 |
| Molecular Weight | 617.63 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C24H19N5O9S3, Ceftiofur Impurity 21 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 617.63 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a process- or degradation-related impurity, Ceftiofur Impurity 21 (CAS CATO-C4X-158121, C24H19N5O9S3) 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 | C24H19N5O9S3 |
| Molecular Weight | 617.63 g/mol |
| Purity | 95% |
| 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 3 |
Related Ceftiofur Standards
- Ceftiofur Impurity 14 (CAS CATO-C4X-158114)
- Ceftiofur Impurity 15 (CAS CATO-C4X-158115)
- Ceftiofur Impurity 11 (CAS CATO-C4X-158111)
- Ceftiofur Impurity 12 (CAS CATO-C4X-158112)
- Ceftiofur Impurity 6 (CAS CATO-C4X-15816)
- Ceftiofur-d3 (CAS 2673269-87-7)
- Ceftiofur-d3 Sodium Salt (CAS 104010-37-9 (unlabelled))
- Ceftiofur Impurity 15 (CAS CATO-C4X-158117)
Recommended Standards
- N-(3-(2'-((2,4-dimethoxybenzyl)amino)-7'-oxo-5'H-spiro[cyclopropane-1,8'-pyrido[4,3-d]pyrimidin]-6'(7'H)-yl)-4-methylphenyl)-3-(trifluoromethyl)benzamide (CAS CATO-CIM-101794)
- Rotigaptide (CAS 355151-12-1)
- Elagolix Impurity 54 (CAS CATO-C4X-206854)
- Tigecycline EP Impurity D(Tigecycline USP related compound A) (CAS 1138343-10-8)
- CAS 2414260-31-2 (CAS 2414260-31-2)
- Doxapram Impurity 16 (CAS CATO-C4X-197316)
- Apalutamide Impurity 36 (CAS CATO-C4X-274936)
- 2-Chloro-4-((4-methylcyclohexyl)oxy)pyrimidine (CAS 1247062-82-3)
- Methyl 2-(tert-butyl)-5-nitrobenzoate (CAS 873056-33-8)
- 2-Chloro-4-phenyl-1,3,5-triazine (CAS 77007-96-6)
- 4-Methyl-N-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-3-yl)benzenesulfonamide (CAS 1162681-06-2)
- 2-[2-(1,3-dioxaindan-5-yl)-1,3-thiazol-4-yl]acetic acid (CAS 1097005-91-8)
- N-(4-(5-Cyano-1-methyl-1H-pyrrol-2-yl)phenyl)butyramide (CAS 921631-43-8)
- Semaglutide impurity 76 (CAS CATO-C4X-222676)
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