Istradefylline Impurity 23 CAS 187393-68-6
| CAS No. | 187393-68-6 |
| Molecular Formula | C19H24N4O5 |
| Molecular Weight | 388.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C19H24N4O5, Istradefylline Impurity 23 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 388.42 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Istradefylline Impurity 23 (CAS 187393-68-6) is a certified pharmaceutical impurity reference standard with the molecular formula C19H24N4O5 and a molecular weight of 388.42 g/mol.
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), Istradefylline Impurity 23 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 | C19H24N4O5 |
| Molecular Weight | 388.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2010 |
| Nitrogen Atoms | 4 |
Related Istradefylline Standards
- Istradefylline impurity 30 (CAS CATO-C4X-106130)
- Istradefylline (CAS 155270-99-8)
- Istradefylline Impurity 1 (CAS 606080-73-3)
- Istradefylline Impurity 22 (CAS 1453190-01-6)
- Istradefylline impurity 31 (CAS CATO-C4X-106131)
- Istradefylline Impurity 6 (CAS CATO-C4X-10616)
- Istradefylline M8 (CAS 1798429-54-5)
- Istradefylline impurity 32 (CAS CATO-C4X-106132)
Recommended Standards
- Celecoxib-d7 (CAS 544686-21-7)
- Fmoc-D-3-Pal-OH (CAS 142994-45-4)
- Atorvastatin Impurity 111 (CAS 175453-07-3)
- N-Hydroxy-2-(6-(pyrrolidin-1-yl)-2-(3,4,5-trimethoxyphenyl)pyrimidin-4-yl)acetamide (CAS 42055-66-3)
- Relugolix Impurity 157 (CAS CATO-C4X-2429157)
- Tirofiban Impurity 50 (CAS CATO-C4X-125450)
- Upadacitinib Impurity 71 (CAS 2411540-29-7)
- 5-Bromo-2,3-bis-trifluoromethyl-pyridine (CAS 1246466-78-3)
- 1,1-Bis(trifluoromethyl)-cyclopropane (CAS 76354-44-4)
- 2-(2-Methyl-4-oxo-1,4-dihydrobenzo[4,5]imidazo[1,2-a]pyrimidin-3-yl)ethyl hexanoate (CAS 866137-38-4)
- Methyl4-chloro-4,4-difluoroacetoacetate (CAS 117510-94-8)
- 1-Benzyl-4-ethylpyrrolidine-3-carbonitrile (CAS 115687-25-7)
- 1,3-Bis(4-(4-Isocyanatobenzyl)phenyl)-1,3-Diazetidine-2,4-Dione (CAS 17589-24-1)
- Semaglutide Impurity 177 (CAS CATO-C4X-2226177)
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