Betamethasone impurity 44 CAS CATO-C4X-143744

Description

Compared with other compounds in its class, the molecular weight of 738.91 g/mol gives Betamethasone impurity 44 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Betamethasone impurity 44 (CAS CATO-C4X-143744), a pharmacopoeial impurity reference standard (molecular formula C22H29FO4C21H27FO4, MW 738.91 g/mol) used for the identification and quantification of trace impurities in APIs.

Based on its molecular formula C22H29FO4C21H27FO4, Betamethasone impurity 44 contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 738.91 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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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