Abemaciclib Impurity 91 CAS 937605-75-9

Description

Compared with other compounds in its class, the molecular weight of 234.68 g/mol gives Abemaciclib Impurity 91 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Abemaciclib Impurity 91 (CAS 937605-75-9), a pharmacopoeial impurity reference standard (molecular formula C12H11ClN2O, MW 234.68 g/mol) used for the identification and quantification of trace impurities in APIs.

Based on its molecular formula C12H11ClN2O, Abemaciclib Impurity 91 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 234.68 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

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