Cefmetazole Impurity 4 CAS 68576-47-6
| CAS No. | 68576-47-6 |
| Molecular Formula | C15H17N7O4S4 |
| Molecular Weight | 487.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Cefmetazole Impurity 4 (CAS 68576-47-6, C15H17N7O4S4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Cefmetazole Impurity 4 (C15H17N7O4S4) 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C15H17N7O4S4 |
| Molecular Weight | 487.60 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 7 |
| Sulfur Atoms | 4 |
Related Cefmetazole Standards
- Cefmetazole Impurity 20 (CAS CATO-C4X-150720)
- Cefmetazole Impurity 34 (CAS CATO-C4X-150734)
- Cefmetazole Impurity 36 (CAS CATO-C4X-150736)
- Cefmetazole Impurity 30 (CAS CATO-C4X-150730)
- Cefmetazole sodium Impurity 24 (CAS 53090-86-1)
- Cefmetazole Impurity 40 (CAS CATO-C4X-150740)
- Cefmetazole Impurity 64 (CAS CATO-C4X-150764)
- Cefmetazole Impurity 65 (CAS CATO-C4X-150765)
Recommended Standards
- 2-((4-Ethyl-5-(pyrazin-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(4-(6-methylbenzo[d]thiazol-2-yl)phenyl)acetamide (CAS 573945-36-5)
- Osimertinib Impurity 41 (CAS CATO-C4X-204541)
- 2-((4-Allyl-5-(furan-2-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(4-(6-methylbenzo[d]thiazol-2-yl)phenyl)acetamide (CAS 618879-97-3)
- H-D-Ala-Leu-Lys-AMC (CAS 104881-72-3)
- Ceftazidime Impurity 99 (CAS CATO-C4X-121299)
- Oseltamivir Impurity 134 (CAS CATO-C4X-1720134)
- Mupirocin EP Impurity D (CAS 71087-97-3)
- 6-Methyl-3-oxo-2-(p-tolyl)-2,3-dihydropyridazine-4-carboxylic acid (CAS 1431729-72-4)
- 2-(5-Fluoropyridin-3-yl)propanoic acid (CAS 1248414-85-8)
- 2-(4-Isopropylbenzoyl)oxazole (CAS 898759-99-4)
- 3-(3-Amino-4-methyl-1h-pyrazol-1-yl)-N,N-dimethylpropanamide (CAS 1341392-80-0)
- 6-(4-Methyl-1,4-diazepan-1-yl)pyridin-3-amine (CAS 295349-73-4)
- 3H-1,2,4-Triazole-3-thione, 2,4-dihydro-4-(2-methylbutyl)-5-(4-methylphenyl)- (CAS 935291-34-2)
- Neuropeptide Y (3-36) (human, rat) trifluoroacetate salt (CAS 150138-78-6)
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