Aprepitant Impurity 42 CAS 13657-16-4

Description

Compared with other compounds in its class, the molecular weight of 163.22 g/mol gives Aprepitant Impurity 42 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Aprepitant Impurity 42 (CAS 13657-16-4) is a certified pharmaceutical impurity reference standard with the molecular formula C10H13NO and a molecular weight of 163.22 g/mol.

The molecular framework of Aprepitant Impurity 42 (C10H13NO) is characterized by a nitrogen-containing heterocyclic scaffold, an amide 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), Aprepitant Impurity 42 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

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