Clemastine EP Impurity B CAS 1352549-49-5

Description

Compared with other compounds in its class, the molecular weight of 343.89 g/mol gives Clemastine EP Impurity B distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Clemastine EP Impurity B (CAS 1352549-49-5), a pharmacopoeial impurity reference standard (molecular formula C21H26ClNO, MW 343.89 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Clemastine EP Impurity B is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 343.89 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

As a certified reference material (CRM), Clemastine EP Impurity B 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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