Lot numbers explained
Last updated May 15, 2026
Lot numbers explained
Every shipment is tied to a specific lot. The lot number is the durable identifier that links your shipment to the COA.
Format
Internal lot numbers look like PS-{peptide}-{YYMMDD}-{n} — for example PS-RETA-260512-A. They appear in JetBrains Mono (our "data face") on the order detail page so they're easy to copy.
Why it matters
- The COA is keyed to the lot, not the SKU. Two orders of the same SKU might pull from different lots with different production dates.
- For incident investigation (broken seal, temperature excursion, COA discrepancy), we trace by lot.
- For regulator inquiries, the lot is the index — the chain-of-custody record lives under it.
How lots get assigned
On placement we lock the earliest-expiring lot with sufficient on-hand quantity. This minimizes waste and keeps the inventory turning. Manual overrides for special-case orders happen at the admin level.
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