Axitinib Impurity 73 CAS CATO-C4X-107173

Description

Compared with other compounds in its class, the molecular weight of 329.37 g/mol gives Axitinib Impurity 73 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Axitinib Impurity 73 (CAS CATO-C4X-107173) is a certified pharmaceutical impurity reference standard with the molecular formula C16H15N3O3S and a molecular weight of 329.37 g/mol.

Axitinib Impurity 73 (C16H15N3O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone 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. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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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