Palbociclib Impurity 56 CAS 571189-51-0
| CAS No. | 571189-51-0 |
| Molecular Formula | C25H31N7O2 |
| Molecular Weight | 461.56 g/mol |
| 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.
As a process- or degradation-related impurity, Palbociclib Impurity 56 (CAS 571189-51-0, C25H31N7O2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C25H31N7O2, Palbociclib Impurity 56 contains a steroid 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 461.56 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.
As a certified reference material (CRM), Palbociclib Impurity 56 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 | C25H31N7O2 |
| Molecular Weight | 461.56 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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 |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Nitrogen Atoms | 7 |
Related Palbociclib Standards
- Palbociclib Impurity 147 (CAS 2624141-94-0)
- Palbociclib Impurity 127 (CAS CATO-C4X-1125127)
- Palbociclib impurity 163 (CAS CATO-C4X-1125163)
- Palbociclib Impurity 189 (CAS CATO-C4X-1125189)
- Palbociclib Impurity 186 (CAS 2174002-29-8)
- Palbociclib Impurity 23 (CAS 2098673-40-4)
- Palbociclib Impurity 58 (CAS 2231085-26-8)
- Palbociclib Impurity 92 (CAS CATO-C4X-112592)
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- (R)-2-propylpyrrolidine-2-carboxylic acid (CAS 637020-48-5)
- 3-[(2,4-Dichlorophenyl)methyl]-4-hydroxy-1-[3-(morpholin-4-yl)propyl]-1,2-dihydropyridin-2-one (CAS 478063-85-3)
- 3-Ethoxy-1-(thiophen-2-yl)prop-2-en-1-one (CAS 143304-05-6)
- Semaglutide impurity 96 (CAS CATO-C4X-222696)
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