Difamilast Impurity 11 CAS 2103190-98-1
| CAS No. | 2103190-98-1 |
| Molecular Formula | C23H24F2N2O7 |
| Molecular Weight | 478.44 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 Difamilast Impurity 11 (CAS 2103190-98-1), a pharmacopoeial impurity reference standard (molecular formula C23H24F2N2O7, MW 478.44 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C23H24F2N2O7, Difamilast Impurity 11 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 478.44 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
Physical & Chemical Properties
| Molecular Formula | C23H24F2N2O7 |
| Molecular Weight | 478.44 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Difamilast Standards
- Difamilast Impurity 2 (CAS 2103190-94-7)
- Difamilast Impurity 4 (CAS 2103190-65-2)
- Difamilast Impurity 6 (CAS 937782-01-9)
- Difamilast (CAS 937782-05-3)
- Difamilast Impurity 5 (CAS 2103190-81-2)
- Difamilast Impurity 8 (CAS 2103190-85-6)
- Difamilast Impurity 3 (CAS 937782-02-0)
- Difamilast Impurity 1 (CAS 1574285-40-7)
Recommended Standards
- Gemcitabine Impurity 34 (CAS CATO-C4X-137234)
- 2,2-Bis((1,3-dioxoisoindolin-2-yl)methyl)propane-1,3-diyl diacetate (CAS 102883-84-1)
- Others Impurity 85 (CAS 731016-26-5)
- Nyasicoside (CAS 111518-94-6)
- Butenafine Impurity 17 (CAS CATO-C4X-159617)
- Pramipexole EP Impurity D diHCl (CAS 104632-27-1)
- Remdesivir Impurity 2 (CAS 1355049-94-3)
- 3,4-Dibromo-2,5-difluorophenylacetic acid (CAS 1803783-39-2)
- 4-(2,4-Dinitrobenzyl)pyridine (CAS 1603-85-6)
- 4-(3-Bromophenyl)pyrimidin-2-ol (CAS 888968-67-0)
- 4-Bromo-2-chloro-5-nitrobenzaldehyde (CAS 1174534-43-0)
- 3-Bromo-3'-methyl-1,1'-biphenyl (CAS 844856-54-8)
- 1H-Indazol-7-yl trifluoromethanesulfonate (CAS 945761-93-3)
- Mast Cell Degranulating (MCD) Peptide HR-2 (CAS 80388-04-1)
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