Batch and Lot Numbers: How Traceability Works
A batch number is only useful if it resolves to a document. Here's how the batch-and-lot system links the vial in your hand to its exact analytical record.
By LOCKED Research Team · Quality & Compliance
Research Use Only. This article is educational and does not constitute medical advice or a claim of safety or efficacy. LOCKED products are supplied for laboratory research use only (RUO). They are not drugs, foods, dietary supplements, cosmetics, or medical devices, are not for human or animal consumption, and are not intended to diagnose, treat, cure, or prevent any disease. LOCKED makes no medical, therapeutic, or performance claims. The purchaser is solely responsible for compliance with all applicable laws and for lawful use.
Traceability is the quiet backbone of research-grade supply. It is what turns a label into a verifiable claim — the mechanism by which the vial in your hand connects to the exact certificate that describes it. Understanding the batch-and-lot system makes that connection legible.
Batch vs. lot
The two terms are often used loosely, but they describe different things:
- A batch is a production run — the material made and tested together. Its Certificate of Analysis reflects the analysis of that run.
- A lot is a specific fill or subdivision of a batch. Multiple lots can come from one batch, and each resolves to the same underlying analytical record.
Think of the batch as the source and the lot as the exact unit that reached you.
How the numbers are structured
A typical LOCKED identifier reads as a compound code, a batch number, and a lot suffix — for example, LOCKED-0412-L07. Decoded: the compound code says which peptide the vial contains, the batch ties it to its synthesis and testing, and the lot pins down the specific fill. Each segment narrows the material until it points to one certificate.
Where to find your number
Your batch and lot numbers are printed on the vial label and listed on your order confirmation. Both resolve to the same Certificate of Analysis — you can enter either one.
Why it protects the researcher
Traceability does two things. First, it lets you verify: enter the number and retrieve the identity, purity, and testing record for your specific material. Second, it makes findings defensible — a documented lineage from synthesis to certificate to vial means downstream results rest on characterized starting material, not an anonymous powder.
Verification you can perform yourself
The test of real traceability is whether you can perform the lookup, not just the seller. Every LOCKED lot resolves to its certificate through our public verification tool — enter the batch or lot number and the record appears. Traceability that only the vendor can demonstrate isn't traceability at all.