Aprepitant impurity 28 CAS 479679-98-6

Description

Compared with other compounds in its class, the molecular weight of 257.35 g/mol gives Aprepitant impurity 28 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Aprepitant impurity 28 (CAS 479679-98-6) is a certified pharmaceutical impurity reference standard with the molecular formula C12H19NO3S and a molecular weight of 257.35 g/mol.

Structurally, Aprepitant impurity 28 (C12H19NO3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 257.35 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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), Aprepitant impurity 28 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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