Ornidazole Impurity 27 CAS 33543-81-6

Description

Compared with other compounds in its class, the molecular weight of 141.08 g/mol gives Ornidazole Impurity 27 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Ornidazole Impurity 27 (CAS 33543-81-6) is a certified pharmaceutical impurity reference standard with the molecular formula C4H3N3O3 and a molecular weight of 141.08 g/mol.

Structurally, Ornidazole Impurity 27 (C4H3N3O3) contains an amino-acid-derived structure, an amide 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 141.08 g/mol, it falls into the low-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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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