Pazufloxacin Impurity 18 CAS 677004-96-5
| CAS No. | 677004-96-5 |
| Molecular Formula | C16H15FN2O4 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Pazufloxacin Impurity 18 (CAS 677004-96-5), a pharmacopoeial impurity reference standard (molecular formula C16H15FN2O4CH4O3S, MW 414.40 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, fluorine substitution, Pazufloxacin Impurity 18 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 414.40 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C16H15FN2O4 CH4O3S |
| Molecular Weight | 414.40 g/mol |
| Purity | >90% |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Pazufloxacin Standards
- Pazufloxacin (CAS 127045-41-4)
- ent-Pazufloxacin-d4 Mesylate (CAS 1346602-24-1)
- Pazufloxacin-d4 Mesylate (CAS 1346602-97-8)
- Pazufloxacin Impurity 8 (CAS 136905-87-8)
- Pazufloxacin Mesilate (CAS 163680-77-1)
- Pazufloxacin Impurity 17 (CAS 164851-44-9)
- Pazufloxacin Impurity 20 (CAS 165071-03-4)
- Pazufloxacin Impurity 10 (CAS 165071-09-0)
Recommended Standards
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- 6-Chloro-4-hydroxy-2-(methylthio)pyrimidine (CAS 6632-63-9)
- 5332-24-1 3-Bromoquinoline Quinoline, 3-bromo- AI3-16560 EINECS 226-237-1 NSC 3995 (CAS 5332-24-1)
- bis(2-cyclohexylguanidine), sulfuric acid (CAS 6331-57-3)
- 4,5-Dimethyl-6-(2-methylprop-1-en-1-yl)-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione (CAS 1195714-29-4)
- (4-Bromo-5-cyclopropoxypyridin-2-yl)methanamine (CAS 1243313-52-1)
- Autocamtide-2-Related Inhibitory Peptide TFA (CAS 167114-91-2（free base）)
Why CATO?
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