Difelikefalin Impurity 2 CAS 1281870-46-9
| CAS No. | 1281870-46-9 |
| Molecular Formula | C21H31N3O4 |
| Molecular Weight | 389.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Difelikefalin Impurity 2 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 389.49 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a process- or degradation-related impurity, Difelikefalin Impurity 2 (CAS 1281870-46-9, C21H31N3O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
As a certified reference material (CRM), Difelikefalin Impurity 2 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C21H31N3O4 |
| Molecular Weight | 389.49 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°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 |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 3 |
Related Difelikefalin Standards
- Difelikefalin Impurity 3 (CAS 956977-18-7)
- Difelikefalin Impurity 4 (CAS 1173664-52-2)
- Difelikefalin Impurity 29 (CAS CATO-C4X-304129)
- Difelikefalin Impurity 1 (CAS 956242-62-9)
- Difelikefalin Impurity 95 (CAS CATO-C4X-304195)
- Difelikefalin Impurity 7 (CAS 956233-15-1)
- Difelikefalin Impurity 91 (CAS CATO-C4X-304191)
- Difelikefalin Impurity 44 (CAS 957006-52-9)
Recommended Standards
- Axitinib-d3 (CAS 1126623-89-9)
- Phosphoric Acid Tris(4-methylphenyl)-d21 Ester (CAS 2469244-63-9)
- 220421-73-8 KS-00002WRP N-{2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl}-N-(pyridin-2-yl)pyridin-2-amine (CAS 220421-73-8)
- Nemonoxacin Impurity 64 (CAS CATO-C4X-312864)
- Semaglutide impurity 36 (CAS CATO-C4X-222636)
- Salbutamol EP Impurity C(Trifluoroacetic Acid) (CAS CATO-C4X-117647)
- Dapagliflozin Impurity 211 (CAS CATO-C4X-1138211)
- (R)-1-(2-Chlorophenyl)propan-1-ol (CAS 151508-76-8)
- 3-(1-{[(9H-fluoren-9-yl)methoxy]carbonyl}piperidin-3-yl)-1H-pyrazole-4-carboxylic acid (CAS 2091893-43-3)
- 2-Methoxy-5-phenylmethanesulfonyl-phenylamine (CAS 2815-50-1)
- 2-Benzyl-2,6-diazaspiro[3.4]Octane (CAS 1194375-87-5)
- 2-(2,6-Dimethylpyridin-4-yl)acetic acid (CAS 502508-96-5)
- 1-(3-Chloro-2,6-difluorophenyl)ethan-1-one (CAS 177942-50-6)
- Peptide Impurity 04 (CAS 2913424-91-4)
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