Pazufloxacin Impurity 20 CAS 165071-03-4
| CAS No. | 165071-03-4 |
| Molecular Formula | C16H14FNO5 |
| Molecular Weight | 319.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Pazufloxacin Impurity 20 (C16H14FNO5) is characterized by a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Pazufloxacin Impurity 20 (CAS 165071-03-4) is a certified pharmaceutical impurity reference standard with the molecular formula C16H14FNO5 and a molecular weight of 319.28 g/mol.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Pazufloxacin Impurity 20 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 | C16H14FNO5 |
| Molecular Weight | 319.28 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >90% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2004 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Pazufloxacin Standards
- Pazufloxacin Impurity 14 (CAS CATO-C4X-233214)
- Pazufloxacin (CAS 127045-41-4)
- Pazufloxacin Impurity 24 (CAS CATO-C4X-233224)
- Pazufloxacin Impurity 15 (CAS CATO-C4X-233215)
- Pazufloxacin Impurity 1 (CAS CATO-C4X-23321)
- Pazufloxacin Impurity 19 (CAS CATO-C4X-233219)
- Pazufloxacin Impurity 12 (CAS CATO-C4X-233212)
- Pazufloxacin Impurity 11 (CAS 165071-10-3)
Recommended Standards
- Undec-10-en-1-yl 2-bromo-2-methylpropanoate (CAS 255727-66-3)
- 6-(Pentafluoro-l6-sulfaneyl)-2-phenyl-1H-indole (CAS 1394319-36-8)
- N-(3-(trifluoromethyl)phenyl)-2H-chromene-3-carboxamide (CAS 338419-97-9)
- 5-(pentafluoro-l6-sulfaneyl)-2-phenyl-1H-indole (CAS 1394319-69-7)
- Prilocaine impurity 37 (CAS CATO-C4X-193437)
- Nacubactam Impurity 1 (CAS CATO-C4X-33001)
- Polaprezinc Impurity 15 (CAS CATO-C4X-182115)
- N-(1-(2-Nitrobenzyl)pyrrolidin-3-yl)isoquinolin-5-amine (CAS 675133-06-9)
- 6-(Pyrrolidin-1-yl)-9H-purine (CAS 1928-89-8)
- 4-Bromo-1-(heptan-4-yl)-1h-pyrazol-5-amine (CAS 1247564-98-2)
- 2-Bromo-5-cyano-3-formylbenzenesulfonyl chloride (CAS 1805485-65-7)
- 1,1-difluorospiro[2.5]octan-6-ol (CAS 1781334-37-9)
- 2,3-Dibromo-4,5-dimethoxybenzonitrile (CAS 330462-55-0)
- Des-Ser34-Gly33Tirzepatide (CAS CATO-CPTD788941)
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