Documentation
Every lot, on the record.
Type the lot code printed on your vial, or the compound name. Reports are published before the batch is listed for sale — including the ones that never make it.
CompoundLot
How a lot is tested
Two independent measurements, run by a laboratory with no commercial interest in the outcome.
Purity — RP-HPLC
Reverse-phase chromatography at 220 nm separates the target from process-related impurities. The main peak area against total area gives the purity figure printed on the report.
Identity — ESI-MS
Electrospray mass spectrometry confirms the observed mass matches the theoretical mass of the sequence. A lot that does not conform is withdrawn, whatever the purity says.
Retention — 24 months
A sealed sample of every lot is retained for two years, so a result can be re-tested against the same material long after the batch has shipped.