Peficitinib Impurity 4 CAS 944118-26-7
| CAS No. | 944118-26-7 |
| Molecular Formula | C18H21N3O3 |
| Molecular Weight | 327.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Peficitinib Impurity 4 (C18H21N3O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Peficitinib Impurity 4 (CAS 944118-26-7) is a certified pharmaceutical impurity reference standard with the molecular formula C18H21N3O3 and a molecular weight of 327.38 g/mol.
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.
As a certified reference material (CRM), Peficitinib Impurity 4 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 | C18H21N3O3 |
| Molecular Weight | 327.38 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.) | 1987 |
| Nitrogen Atoms | 3 |
Related Peficitinib Standards
- Peficitinib Impurity 10 (CAS 944118-24-5)
- Peficitinib Impurity 11 (CAS 944134-77-4)
- Peficitinib Impurity 8 (CAS 944123-25-5)
- Peficitinib (CAS 944118-01-8)
- Peficitinib-d3 (CAS CATO-C4X-280717)
- Peficitinib-d3,15N (CAS CATO-C4X-280718)
- Peficitinib Impurity 13 (CAS 944118-04-1)
- Peficitinib Impurity 23 (CAS 2055576-50-4)
Recommended Standards
- Norfloxacin-d8 (CAS 1216601-32-9)
- Upadacitinib Impurity 196 (CAS CATO-C4X-2405196)
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- Upadacitinib Impurity 181 (CAS CATO-C4X-2405181)
- Epinephrine Impurity 66 (CAS CATO-C4X-184966)
- Tegoprazan Impurity 131 (CAS CATO-C4X-2297131)
- Relebactam Impurity 22 (CAS CATO-C4X-214422)
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Why CATO?
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