Tofacitinib Impurity 239 CAS CATO-C4X-1079239

Description

Compared with other compounds in its class, the molecular weight of 338.41 g/mol gives Tofacitinib Impurity 239 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Tofacitinib Impurity 239 (CAS CATO-C4X-1079239), a pharmacopoeial impurity reference standard (molecular formula C18H22N6O, MW 338.41 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Tofacitinib Impurity 239 (C18H22N6O) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 338.41 g/mol, it falls into the moderately-high-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.

CATO manufactures Tofacitinib Impurity 239 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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