Cefadroxil Impurity 19 CAS CATO-C4X-122419
| CAS No. | CATO-C4X-122419 |
| Molecular Formula | C16H17N3O5S |
| Molecular Weight | 363.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Cefadroxil Impurity 19 (CAS CATO-C4X-122419, C16H17N3O5S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Cefadroxil Impurity 19 (C16H17N3O5S) 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 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 363.39 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.
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 | C16H17N3O5S |
| Molecular Weight | 363.39 g/mol |
| Purity | 97%+ |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefadroxil Standards
- Cefadroxil EP Impurity D (CAS 144790-28-3)
- Cefadroxil USP Related Compound I (CAS 147103-94-4)
- Cefadroxil Impurity 43 (CAS CATO-C4X-122443)
- Cefadroxil (CAS 50370-12-2)
- Cefadroxil Ethyl Homolog (CAS 2243976-70-5)
- R-Cefadroxil Sulfoxide (CAS CATO-C4X-122415)
- S-Cefadroxil Sulfoxide (CAS CATO-C4X-122416)
- Cefadroxil Impurity 25 (CAS CATO-C4X-122425)
Recommended Standards
- Cefradine EP Impurity E (CAS 215172-75-1)
- N-[5-(3-Methylphenyl)-1,3,4-thiadiazol-2-yl]-2-oxo-2H-chromene-3-carboxamide (CAS 476459-92-4)
- N-(4-(4-Cyanophenyl)thiazol-2-yl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide (CAS 681168-42-3)
- Methyl 4-(2-(2-((ethoxycarbonyl)amino)thiazol-4-yl)acetamido)benzoate (CAS 946284-80-6)
- Elagolix Impurity 20 (CAS 110143-62-9)
- Letrozole Impurity 37 (CAS 30132-90-2)
- Amifostine Impurity 10 (CAS 10563-27-6)
- N-((1H-benzo[d][1,2,3]triazol-1-yl)methyl)-4-bromo-2-fluoroaniline (CAS 298217-92-2)
- N-(5-Amino-2-methylphenyl)-2-(hexyloxy)benzamide (CAS 1020723-78-7)
- 3-(2-Bromo-5-fluorobenzyl)piperidin-3-ol (CAS 1490642-08-4)
- 2-Ethyl-5-nitrobenzoic acid (CAS 90564-19-5)
- (3-((Furan-2-ylmethyl)sulfonyl)pyrrolidin-1-yl)(4-(2-methoxyethoxy)phenyl)methanone (CAS 1795083-76-9)
- 4-Methyl-4a,5,6,7,8,9-hexahydrothieno[3',2':4,5]pyrimido[1,2-a]azepin-11(4H)-one (CAS 1710202-95-1)
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