| CAS No. | 192573-35-6 |
| Molecular Formula | C23H44O4Si |
| Molecular Weight | 412.68 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 412.68 g/mol gives Maxacalcitol Impurity 20 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Maxacalcitol Impurity 20 (CAS 192573-35-6) is a certified pharmaceutical impurity reference standard with the molecular formula C23H44O4Si and a molecular weight of 412.68 g/mol.
The molecular framework of Maxacalcitol Impurity 20 (C23H44O4Si) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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), Maxacalcitol Impurity 20 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.
| Molecular Formula | C23H44O4Si |
| Molecular Weight | 412.68 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 2012 |