Norfloxacin Impurity 57 CAS CATO-C4X-146857
| CAS No. | CATO-C4X-146857 |
| Molecular Formula | C11H7ClFNO3 |
| Molecular Weight | 255.63 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Norfloxacin Impurity 57 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.
Norfloxacin Impurity 57 (CAS CATO-C4X-146857) is a certified pharmaceutical impurity reference standard with the molecular formula C11H7ClFNO3 and a molecular weight of 255.63 g/mol.
Based on its molecular formula C11H7ClFNO3, Norfloxacin Impurity 57 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 255.63 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.
Physical & Chemical Properties
| Molecular Formula | C11H7ClFNO3 |
| Molecular Weight | 255.63 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | ＞95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 1 |
Related Norfloxacin Standards
- Norfloxacin Impurity 32 (CAS 70032-16-5)
- Norfloxacin Impurity 3 (CAS 16600-24-1)
- Norfloxacin Impurity 12 (CAS 75001-63-7)
- Norfloxacin Impurity 52 (CAS 7251-32-3)
- Norfloxacin Impurity 60 (CAS CATO-C4X-146860)
- Norfloxacin Impurity C70 (CAS 106847-38-5)
- Norfloxacin Impurity C18 (CAS 70458-93-4)
- Norfloxacin Impurity 4 (CAS 75073-15-3)
Recommended Standards
- Flucloxacillin EP Impurity D (CAS 3919-74-2)
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- 6-Amino-1-(3-chloro-4-fluorophenyl)pyrimidine-2,4(1H,3H)-dione (CAS 887201-82-3)
- Sunitinib Impurity 9 (CAS 356068-98-9)
- Orforglipron impurity 127 (CAS 2203400-61-5)
- Aspirin impurity 31 (CAS CATO-C4X-140831)
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- Lesinurad Impurity 34 (CAS 878671-95-5)
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- 3-(2,4-Difluorophenyl)-3-methylbutanoic acid (CAS 1368736-46-2)
- Peptide WE-14 (CAS 115136-18-0)
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