Cefprozil (Z)-Isomer Impurity 44 CAS CATO-C4X-149244
| CAS No. | CATO-C4X-149244 |
| Molecular Formula | C18H19N3O5S |
| Molecular Weight | 389.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Cefprozil (Z)-Isomer Impurity 44 (CAS CATO-C4X-149244, C18H19N3O5S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Cefprozil (Z)-Isomer Impurity 44 (C18H19N3O5S) 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 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 389.43 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).
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.
Physical & Chemical Properties
| Molecular Formula | C18H19N3O5S |
| Molecular Weight | 389.43 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 |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefprozil Standards
- Cefprozil Impurity N1(Z-Cefprozil) (CAS 121412-77-9)
- Cefprozil (CAS 92665-29-7)
- Cefprozil Δ3 Isomer (CAS 1000980-59-5)
- Cefprozil EP Impurity K-Isomer 1 (CAS CATO-C4X-149216)
- Cefprozil (E)-Isomer (CAS 92676-86-3)
- Cefprozil EP Impurity K-Isomer 2 (CAS CATO-C4X-149222)
- Cefprozil EP Impurity K-Isomer 3 (CAS CATO-C4X-149223)
- Cefprozil EP Impurity K-Isomer 4 (CAS CATO-C4X-149224)
Recommended Standards
- Cefprozil Impurity 35 (CAS CATO-C4X-149235)
- Cefprozil (Z)-isomer Impurity 48 (CAS CATO-C4X-149248)
- Cefprozil EP Impurity K Mixture(Isomer 1,2,3,4) (CAS CATO-C4X-149226)
- Cefprozil Impurity 51 (CAS CATO-C4X-149251)
- Linagliptin impurity 98 (CAS CATO-C4X-110198)
- Chlorpheniramine Impurity 41 (CAS 101286-08-2)
- Ceftriaxone impurity 53 (CAS CATO-C4X-116353)
- 7-Chloro-5-ethyl-3-methylisoxazolo[4,5-d]pyrimidine (CAS 1268519-94-3)
- 1-Ethyl-1H-naphtho[2,3-d]imidazole (CAS 89187-98-4)
- 58048-37-6 2-(2,4-Dichlorophenoxy)propanoyl chloride DTXSID20558730 (CAS 58048-37-6)
- Posaconazole impurity 227 (CAS CATO-C4X-1208227)
- 5-(2-Chlorophenyl)-N-(3-nitrophenyl)furan-2-carboxamide (CAS 199458-86-1)
- 2-(Chloromethyl)-5,6-dimethoxy-1h-1,3-benzodiazole hydrochloride (CAS 1803582-86-6)
- Semaglutide Impurity 124 (CAS CATO-C4X-2226124)
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