Albendazole Impurity 21 CAS 20735-00-6

Description

Compared with other compounds in its class, the molecular weight of 271.40 g/mol gives Albendazole Impurity 21 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Albendazole Impurity 21 (CAS 20735-00-6) is a certified pharmaceutical impurity reference standard with the molecular formula C12H17NO2S2 and a molecular weight of 271.40 g/mol.

Structurally, Albendazole Impurity 21 (C12H17NO2S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 271.40 g/mol, it falls into the medium-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

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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