Lemborexant Impurity 78 CAS CATO-C4X-304278

Description

Compared with other compounds in its class, the molecular weight of 396.39 g/mol gives Lemborexant Impurity 78 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Lemborexant Impurity 78 (CAS CATO-C4X-304278) is a certified pharmaceutical impurity reference standard with the molecular formula C21H18F2N4O2 and a molecular weight of 396.39 g/mol.

Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, Lemborexant Impurity 78 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 396.39 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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), Lemborexant Impurity 78 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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