Cefminox Impurity 27 CAS 75498-97-4
| CAS No. | 75498-97-4 |
| Molecular Formula | C16H21N7O7S3 |
| Molecular Weight | 519.58 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Cefminox Impurity 27 (CAS 75498-97-4) is a certified pharmaceutical impurity reference standard with the molecular formula C16H21N7O7S3 and a molecular weight of 519.58 g/mol.
Based on its molecular formula C16H21N7O7S3, Cefminox Impurity 27 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 519.58 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C16H21N7O7S3 |
| Molecular Weight | 519.58 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 7 |
| Sulfur Atoms | 3 |
Related Cefminox Standards
- Cefminox (CAS 84305-41-9)
- Cefminox Sodium Impurity 11 (CAS CATO-C4X-192611)
- Cefminox Impurity 12 (CAS CATO-C4X-192612)
- Cefminox Sodium-△3isomer 1 (CAS CATO-C4X-192618)
- Cefminox Sodium-△3isomer 2 (CAS CATO-C4X-192619)
- Cefminox Sodium-△3isomer 3 (CAS CATO-C4X-192624)
- Cefminox Sodium-△3isomer (CAS CATO-C4X-192643)
- Cefminox impurity 52 (CAS CATO-C4X-192652)
Recommended Standards
- Tucatinib Impurity 51 (CAS CATO-C4X-260551)
- N-Boc-N-bis(PEG3-azide) (CAS 1258939-38-6)
- 3,4-Dimethoxy-N-(4-(3-nitrophenyl)-5-(piperazin-1-ylmethyl)thiazol-2-yl)benzenesulfonamide (CAS 1951440-83-7)
- N-(Propargyl-PEG4-carbonyl)-N-bis(PEG1-methyl ester) (CAS 2112732-01-9)
- Lifitegrast Impurity 34 (CAS CATO-C4X-240934)
- Palbociclib Impurity 144 (CAS CATO-C4X-1125144)
- Terbinafine Impurity N2 (CAS 99473-15-1)
- methyl 4-chlorothieno[3,2-d]pyrimidine-7-carboxylate (CAS 1246223-44-8)
- 6-methyl-5H,6H,7H,8H-imidazo[1,2-a]pyridine-2-carboxylic acid hydrochloride (CAS 2060006-29-1)
- AdipicAcidMonomethylMonohydrazide (CAS 1207956-09-9)
- tert-Butyl 2,5-Diazabicyclo[2.2.2]octane-2-carboxylate (CAS 858671-91-7)
- 5-Fluoro-1-(4-hydroxy-5-((trityloxy)methyl)tetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione (CAS 10343-71-2)
- tert-butyl 2-tert-butyl-4-oxo-1,3-diazinane-1-carboxylate (CAS 220116-69-8)
- Liraglutide Impurity 26 (CAS CATO-C4X-199226)
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