Cephalexin Sulfoxide Impurity 31 CAS 74708-55-7

Description

The occurrence of Cephalexin Sulfoxide Impurity 31 is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies Cephalexin Sulfoxide Impurity 31 (CAS 74708-55-7), a pharmacopoeial impurity reference standard (molecular formula C16H17N3O5S, MW 363.39 g/mol) used for the identification and quantification of trace impurities in APIs.

Cephalexin Sulfoxide Impurity 31 (C16H17N3O5S) contains a flavonoid core, 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. 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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