Azathioprine Impurity 26 CAS 18753-82-7

Description

Compared with other compounds in its class, the molecular weight of 194.21 g/mol gives Azathioprine Impurity 26 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Azathioprine Impurity 26 (CAS 18753-82-7), a pharmacopoeial impurity reference standard (molecular formula C7H6N4OS, MW 194.21 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Azathioprine Impurity 26 (C7H6N4OS) contains an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 194.21 g/mol, it falls into the medium-molecular-weight range. 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 Azathioprine Impurity 26 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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