Key takeaways
- ✓Match the batch number on the vial to the number on the CoA before anything else.
- ✓Online verification and lab report numbers make documents harder to forge.
- ✓Record batch details at receipt so any later question can be answered.
The chain of custody
A traceable batch has a number that appears on the vial label, on the CoA and in the supplier's records. Each link should be checkable by the buyer.
What to compare
Any mismatch is a reason to stop and ask before using the material.
- Batch or lot number on vial and CoA.
- Compound name and quantity.
- Testing date relative to manufacture.
- Lab name and report number, where present.
Online verification
Some suppliers let you enter a batch number on their website to retrieve the matching CoA. Nordapep offers online batch verification alongside a Certificate of Analysis per batch. A lookup does not replace reading the CoA, but it confirms the document exists in the supplier's records.
Keep your own record
Log the compound, batch number, date received, supplier, quantity, storage location and CoA reference when each vial arrives. The batch log tool does this in your browser and exports to CSV.
If something does not match
Photograph the label, keep the vial sealed and contact the supplier with the batch number and the discrepancy. Do not discard documents until it is resolved.
More guides
Cite this page
peptide.wiki. (2026). Batch verification and traceability: proving a CoA belongs to your vial. peptide.wiki. https://www.peptide.wiki/guides/peptide-batch-verification-and-traceability