Josamycin EP Impurity G CAS 18361-49-4

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Josamycin EP Impurity G.

Josamycin EP Impurity G (CAS 18361-49-4) is a certified pharmaceutical impurity reference standard with the molecular formula C37H61NO14 and a molecular weight of 743.88 g/mol.

Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Josamycin EP Impurity G is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 743.88 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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), Josamycin EP Impurity G 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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