Epalrestat impurity 41 CAS CATO-C4X-223641

Description

Compared with other compounds in its class, the molecular weight of 637.81 g/mol gives Epalrestat impurity 41 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Epalrestat impurity 41 (CAS CATO-C4X-223641), a pharmacopoeial impurity reference standard (molecular formula C31H27NO6S4, MW 637.81 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Epalrestat impurity 41 (C31H27NO6S4) 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 19.0, corresponding to approximately 19 ring(s) or double-bond equivalent(s). With a molecular weight of 637.81 g/mol, it falls into the high-molecular-weight range. 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.

CATO manufactures Epalrestat impurity 41 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

Physical & Chemical Properties

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