Delafloxacin Impurity 21 CAS CATO-C4X-263721
| CAS No. | CATO-C4X-263721 |
| Molecular Formula | C18H12F4N4O4 |
| Molecular Weight | 424.31 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Delafloxacin Impurity 21 (CAS CATO-C4X-263721), a pharmacopoeial impurity reference standard (molecular formula C18H12F4N4O4, MW 424.31 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H12F4N4O4, Delafloxacin Impurity 21 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 424.31 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C18H12F4N4O4 |
| Molecular Weight | 424.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
Related Delafloxacin Standards
- delafloxacin Impurity 8 (CAS 2097714-10-6)
- Delafloxacin impurity 35 (CAS CATO-C4X-263735)
- Delafloxacin (CAS 189279-58-1)
- Delafloxacin Impurity 15 (CAS CATO-C4X-263715)
- delafloxacin Impurity 4 (CAS CATO-C4X-26374)
- delafloxacin Impurity 6 (CAS CATO-C4X-26376)
- Delafloxacin Impurity 30 (CAS CATO-C4X-263730)
- Delafloxacin impurity 36 (CAS CATO-C4X-263736)
Recommended Standards
- 303150-77-8 5-(4-bromophenyl)-2-[(4-methylphenyl)sulfonyl]-5-oxopentanamide KS-00002Z38 (CAS 303150-77-8)
- 3-(2,4-Dichlorophenyl)-4-(p-tolyl)-5-((p-tolyloxy)methyl)-4H-1,2,4-triazole (CAS 141079-03-0)
- 1-{4'-Bromo-[1,1'-biphenyl]-4-sulfonamido}cyclopentane-1-carboxylic acid (CAS 326499-72-3)
- 3-((4-Chloro-3-methylphenoxy)methyl)-5-(4-chlorophenyl)-4-(p-tolyl)-4H-1,2,4-triazole (CAS 141079-07-4)
- Crizotinib impurity 27 (CAS CATO-C4X-102527)
- Dexamethasone Impurity 24 (CAS 55879-47-5)
- Ruilugoli lmpurity 125（Z-isomer） (CAS CATO-C4X-2429125)
- Nilotinib Hydrochloride Dihydrate (CAS 923289-71-8)
- 2-[1-(4-Aminophenyl)ethylidene]propanedinitrile (CAS 122520-80-3)
- 2-methyl-1-(3-pyridinyl)piperazine hydrochloride 2-methyl-1-pyridin-3-yl-piperazine hydrochloride 510725-49-2 A828427 (CAS 510725-49-2)
- tert-butyl 2-tert-butyl-4-oxo-1,3-diazinane-1-carboxylate (CAS 220116-69-8)
- Ethyl 2-(indolin-2-yl)acetate (CAS 64132-03-2)
- Doxorubicin Impurity 29 (CAS CATO-C4X-203329)
- Lixisenatide (CAS 320367-13-3（free base）)
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