rac-Clemastine Fumarate EP Impurity B CAS 61771-18-4

Description

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

CATO supplies rac-Clemastine Fumarate EP Impurity B (CAS 61771-18-4), 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, rac-Clemastine Fumarate 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

CATO manufactures rac-Clemastine Fumarate EP Impurity B 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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