Methylprednisolone Impurity 81 CAS 82332-00-1

Description

The occurrence of Methylprednisolone Impurity 81 is closely related to a flavonoid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

CATO supplies Methylprednisolone Impurity 81 (CAS 82332-00-1), a pharmacopoeial impurity reference standard (molecular formula C22H30O4, MW 358.47 g/mol) used for the identification and quantification of trace impurities in APIs.

Based on its molecular formula C22H30O4, Methylprednisolone Impurity 81 contains a flavonoid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 358.47 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.

As a certified reference material (CRM), Methylprednisolone Impurity 81 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

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