Azathioprine Impurity 19 CAS 304441-05-2

Description

Compared with other compounds in its class, the molecular weight of 319.30 g/mol gives Azathioprine Impurity 19 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Azathioprine Impurity 19 (CAS 304441-05-2) is a certified pharmaceutical impurity reference standard with the molecular formula C11H9N7O3S and a molecular weight of 319.30 g/mol.

Azathioprine Impurity 19 (C11H9N7O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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), Azathioprine Impurity 19 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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