Sitafloxacin impurity 91 CAS CATO-C4X-115591
| CAS No. | CATO-C4X-115591 |
| Molecular Formula | C38H35ClF4N6O5 |
| Molecular Weight | 767.17 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C38H35ClF4N6O5, Sitafloxacin impurity 91 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 767.17 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a process- or degradation-related impurity, Sitafloxacin impurity 91 (CAS CATO-C4X-115591, C38H35ClF4N6O5) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 | C38H35ClF4N6O5 |
| Molecular Weight | 767.17 g/mol |
| Purity | 97%+ |
| 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) | 22.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 6 |
Related Sitafloxacin Standards
- Sitafloxacin Impurity 31 (CAS CATO-C4X-115531)
- Sitafloxacin impurity 48 (CAS CATO-C4X-111548)
- Sitafloxacin Impurity 83 (CAS CATO-C4X-115583)
- Sitafloxacin impurity 76 (CAS CATO-C4X-115576)
- Sitafloxacin impurity 73 (CAS CATO-C4X-115573)
- Sitafloxacin Impurity 23 (CAS 147782-16-9)
- Sitafloxacin impurity 88 (CAS CATO-C4X-115588)
- Sitafloxacin impurity 71 (CAS CATO-C4X-115571)
Recommended Standards
- Cobalt, chloro[[4,4′,4′′,4′′′-(21H,23H-porphine-5,10,15,20-tetrayl-κN21,κN22,κN23,κN24)tetrakis[benzenaminato]](2-)]-, (SP-5-12)- (CAS 492444-96-9)
- Allisartan Isoproxil Impurity 23 (CAS CATO-C4X-321723)
- Ursodeoxycholic Acid Impurity 70 (CAS CATO-C4X-142270)
- Allisartan Isoproxil Impurity 30 (CAS CATO-C4X-321730)
- Rivaroxaban Impurity 2 (CAS 1365267-36-2)
- Osimertinib Impurity 21 (CAS 2919324-15-3)
- Linagliptin Impurity 129 (CAS CATO-C4X-1101129)
- 1-[2-(benzyloxy)-4-methylphenyl]ethanone (CAS 58110-89-7)
- 5-(Ethoxycarbonyl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-2-carboxylic acid (CAS 937601-49-5)
- Cholic acid Impurity 11 (CAS 84848-09-9)
- 3,7-Bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-10H-phenothiazine (CAS 1453809-16-9)
- 2-Ethyl-1,3-dimethyl-2,3-dihydroimidazo[5,1-b]quinazolin-9(1H)-one (CAS 143993-85-5)
- 2-(Bromomethyl)-5-(trifluoromethyl)pyridine (CAS 1000773-62-5)
- Peptide Impurity 12 (CAS CATO-CPTD788812)
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