Difloxacin Impurity 1 CAS CATO-C4X-21091
| CAS No. | CATO-C4X-21091 |
| Molecular Formula | C21H18F2N3O4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 437.38 g/mol gives Difloxacin Impurity 1 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Difloxacin Impurity 1 (CAS CATO-C4X-21091) is a certified pharmaceutical impurity reference standard with the molecular formula C21H18F2N3O4Na and a molecular weight of 437.38 g/mol.
Difloxacin Impurity 1 (C21H18F2N3O4Na) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine 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. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
CATO manufactures Difloxacin Impurity 1 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H18F2N3O4 Na |
| Molecular Weight | 437.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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) | 13.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Difloxacin Standards
Recommended Standards
- Lenacapavir Impurity 89 (CAS CATO-C4X-32489)
- Orforglipron impurity 80 (CAS CATO-C4X-323480)
- Lurasidone Impurity 36 (CAS CATO-C4X-102836)
- (E)-3-(2,3-Dimethoxyphenyl)prop-2-en-1-amine (CAS 1315377-90-2)
- Methyl 4-(3-methoxy-3-oxopropanoyl)-3,5-dinitrobenzoate (CAS 419552-08-2)
- N-Vinylcaprolactam (CAS 2235-00-9)
- Uridine Impurity 7 (CAS CATO-C4X-23347)
- 2-(Trifluoromethyl)-4,5,6,7-tetrahydrothieno[2,3-c]pyridine (CAS 1260670-73-2)
- Mianserin Impurity 116 (CAS 142643-19-4)
- Semaglutide Impurity 12 (CAS CATO-C4X-222612)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com