Cefdinir Impurity 79 CAS 116856-25-8
| CAS No. | 116856-25-8 |
| Molecular Formula | C17H18ClN5O7S2 |
| Molecular Weight | 503.94 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Cefdinir Impurity 79 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Cefdinir Impurity 79 (CAS 116856-25-8) is a certified pharmaceutical impurity reference standard with the molecular formula C17H18ClN5O7S2 and a molecular weight of 503.94 g/mol.
Cefdinir Impurity 79 (C17H18ClN5O7S2) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C17H18ClN5O7S2 |
| Molecular Weight | 503.94 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefdinir Standards
- Cefdinir Impurity 80 (CAS 137054-66-1)
- Cefdinir Impurity 54 (CAS CATO-C4X-121054)
- Cefdinir Impurity 91 (CAS 206855-74-5)
- Cefdinir Impurity25 (CAS 1637542-33-6)
- Cefdinir Impurity 71 (CAS CATO-C4X-121071)
- Cefdinir Impurity 36 (CAS CATO-C4X-121036)
- Cefdinir Impurity 85 (CAS CATO-C4X-121085)
- Cefdinir Impurity 67 (CAS CATO-C4X-121067)
Recommended Standards
- 2-(2-(1-(3-Chloro-5-(trifluoromethyl)pyridin-2-yl)-1H-indol-3-yl)acetyl)-N-phenylhydrazine-1-carbothioamide (CAS 339099-35-3)
- N-(2-{4-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl}pyridin-3-yl)thiophene-2-sulfonamide (CAS 338411-80-6)
- Diethyl 5-((R)-2-((R)-5-(3-chlorophenyl)-2-oxooxazolidin-3-yl)propyl)benzo[d][1,3]dioxole-2,2-dicarboxylate (CAS 139013-14-2)
- CAS 2323570-72-3 (CAS 2323570-72-3)
- Levofolinate Impurity 13 Calcium Salt (CAS CATO-C4X-133513)
- Ioversol Impurity 23 (CAS CATO-C4X-209123)
- Cefminox Impurity 30 (CAS CATO-C4X-192630)
- Mecoprop-2-Butoxyethyl Ester (CAS 23359-62-8)
- 4-(2,3-Difluorophenyl)piperidin-4-ol hydrochloride (CAS 1628689-12-2)
- 5-Bromo-1-(piperidin-1-yl)isoquinoline (CAS 1330754-99-8)
- 4-Methyl-N-(2-methylcyclopentyl)pyridin-3-amine (CAS 1492193-64-2)
- 2-hydrazinylpyridine hydrochloride (CAS 51169-05-2)
- n-(1-Cyclohexylethyl)prop-2-en-1-amine (CAS 1158051-67-2)
- Des-Tyr10-Tirzepatide (CAS CATO-CPTD788680)
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