Tofacitinib Impurity 201 CAS CATO-C4X-1079201

Description

Compared with other compounds in its class, the molecular weight of 157.21 g/mol gives Tofacitinib Impurity 201 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Tofacitinib Impurity 201 (CAS CATO-C4X-1079201) is a certified pharmaceutical impurity reference standard with the molecular formula C7H15N3O and a molecular weight of 157.21 g/mol.

The molecular framework of Tofacitinib Impurity 201 (C7H15N3O) is characterized by an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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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