Clindamycin Impurity 20 CAS 36688-78-5

Description

Compared with other compounds in its class, the molecular weight of 663.39 g/mol gives Clindamycin Impurity 20 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Clindamycin Impurity 20 (CAS 36688-78-5) is a certified pharmaceutical impurity reference standard with the molecular formula C34H63ClN2O6S and a molecular weight of 663.39 g/mol.

Based on its molecular formula C34H63ClN2O6S, Clindamycin Impurity 20 contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 663.39 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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