Ethosuximide impurity 8 CAS CATO-C4X-26258

Description

Compared with other compounds in its class, the molecular weight of 166.18 g/mol gives Ethosuximide impurity 8 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Ethosuximide impurity 8 (CAS CATO-C4X-26258), a pharmacopoeial impurity reference standard (molecular formula C8H10N2O2, MW 166.18 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Ethosuximide impurity 8 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 166.18 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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

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