Cefotaxime Impurity 43 CAS 2172369-67-2

Description

Compared with other compounds in its class, the molecular weight of 330.36 g/mol gives Cefotaxime Impurity 43 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Cefotaxime Impurity 43 (CAS 2172369-67-2), a pharmacopoeial impurity reference standard (molecular formula C12H18N4O5S, MW 330.36 g/mol) used for the identification and quantification of trace impurities in APIs.

Cefotaxime Impurity 43 (C12H18N4O5S) 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. 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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