Ceftiofur Impurity 13 CAS CATO-C4X-158113
| CAS No. | CATO-C4X-158113 |
| Molecular Formula | C19H18N4O6S2 |
| Molecular Weight | 462.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Ceftiofur Impurity 13 (C19H18N4O6S2) 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 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 462.50 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).
Ceftiofur Impurity 13 (CAS CATO-C4X-158113) is a certified pharmaceutical impurity reference standard with the molecular formula C19H18N4O6S2 and a molecular weight of 462.50 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 | C19H18N4O6S2 |
| Molecular Weight | 462.50 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 2 |
Related Ceftiofur Standards
- Ceftiofur Impurity 5 (CAS 120882-25-9)
- Ceftiofur Impurity 7 (CAS CATO-C4X-15817)
- Ceftiofur Impurity 15 (CAS CATO-C4X-158117)
- Ceftiofur Impurity 2 (CAS 120962-17-6)
- Ceftiofur Impurity 3 (CAS 120882-20-4)
- Ceftiofur (CAS 80370-57-6)
- Ceftiofur-d3 Sodium Salt (CAS 104010-37-9 (unlabelled))
- Ceftiofur-d3 (CAS 2673269-87-7)
Recommended Standards
- Cefamandole Impurity 19 (CAS CATO-C4X-122119)
- Semaglutide impurity 103 (CAS 1446013-07-5)
- (7S)-Cefamandole Impurity 18 (CAS 1146611-43-9)
- Semaglutide impurity 104(Fmoc-D-His-Aib) (CAS 2171211-18-8)
- Calcipotriol Impurity 25 (CAS CATO-C4X-122225)
- Etonogestrel Impurity 2 (CAS 946163-50-4)
- Tamsulosin Impurity 43 (CAS CATO-C4X-118743)
- N-Ethyl-4-(trifluoromethyl)aniline (CAS 820209-45-8)
- 4-Nitrophenyl 2-(m-tolyl)-7-azaspiro[3.5]Nonane-7-carboxylate (CAS 1225276-23-2)
- 3-{4-[(2-Thienylcarbonyl)amino]phenoxy}-2-thiophenecarboxylic acid (CAS 900015-28-3)
- 2-((4,6-Dimethylpyrimidin-2-yl)thio)-1-(thiophen-2-yl)ethan-1-one (CAS 334500-76-4)
- 1-(2,2-Diethoxyethyl)-3-(trifluoromethyl)benzene (CAS 1269152-61-5)
- Linagliptin Impurity 36 (CAS 1638744-06-5)
- endo-Arg30-Semaglutide (CAS CATO-C4X-2226281)
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