Febuxostat Impurity 5 CAS 7133-90-6

Description

Compared with other compounds in its class, the molecular weight of 153.20 g/mol gives Febuxostat Impurity 5 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Febuxostat Impurity 5 (CAS 7133-90-6), a pharmacopoeial impurity reference standard (molecular formula C7H7NOS, MW 153.20 g/mol) used for the identification and quantification of trace impurities in APIs.

Based on its molecular formula C7H7NOS, Febuxostat Impurity 5 contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 153.20 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

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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