Instrument Checks Behind Every Lot

Identity first, then purity. Each batch is confirmed by electrospray ionisation mass spectrometry, comparing the observed molecular ion against the theoretical mass for the target sequence. Assay purity is then quantified by reversed-phase high-performance liquid chromatography with UV detection at 214 nanometres; residual water is measured by Karl Fischer titration, and elemental impurities are assessed against ICH Q3D where the material calls for it.

The resulting table, both traces and the lot reference are archived together and remain retrievable from the lot-records portal by compound name, with no account required. Bench reviewers preparing internal approvals can request the fuller method package from the lab desk after a one-time institutional confirmation.