Florfenicol Impurity 5 CAS CATO-C4X-20755
| CAS No. | CATO-C4X-20755 |
| Molecular Formula | C24H28Cl4N2O9S2 |
| Molecular Weight | 694.43 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Florfenicol Impurity 5 is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Florfenicol Impurity 5 (CAS CATO-C4X-20755) is a certified pharmaceutical impurity reference standard with the molecular formula C24H28Cl4N2O9S2 and a molecular weight of 694.43 g/mol.
Based on its molecular formula C24H28Cl4N2O9S2, Florfenicol Impurity 5 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 694.43 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C24H28Cl4N2O9S2 |
| Molecular Weight | 694.43 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Florfenicol Standards
- Florfenicol Impurity 12 (CAS CATO-C4X-207512)
- Florfenicol Impurity 13 (CAS CATO-C4X-207513)
- Florfenicol Impurity 6 (CAS CATO-C4X-20756)
- Florfenicol Impurity 16 (CAS CATO-C4X-207516)
- Florfenicol-d3 Discontinued see: F405751 (CAS 1322626-75-4)
- Florfenicol Impurity 8 (CAS CATO-C4X-20758)
- Florfenicol-d5 (CAS CATO-C4X-207515)
- Florfenicol-d3 (CAS 2213400-85-0)
Recommended Standards
- Nitratobis(triphenylphosphine)silver (CAS 86859-00-9)
- Fosaprepitant Impurity 45 (CAS CATO-C4X-116845)
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- Fosaprepitant Impurity 44 (CAS CATO-C4X-116844)
- Apixaban Impurity 55 (CAS 27143-09-5/132839-05-5)
- Sepiapterin Impurity 11 (CAS 1177884-36-4)
- Vonoprazan Impurity 184 (CAS CATO-C4X-1020184)
- Ramelteon Impurity C01 (CAS 752184-07-9)
- 3-(2-(4-Hydroxypiperidin-1-yl)-2-oxoethoxy)benzaldehyde (CAS 1365940-18-6)
- N-(3-methoxybenzyl)-1-(pyridin-2-yl)methanamine (CAS 880812-56-6)
- 2-Bromo-N-(3-methoxybenzyl)propanamide (CAS 1225806-43-8)
- 3-(1-Piperidinyl)piperidine dihydrochloride (CAS 813425-61-5)
- 2-(4-Methoxyphenyl)-2-(methylamino)acetonitrile (CAS 86147-93-5)
- Tirzepatide Impurity 50 (CAS CATO-C4X-324050)
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