What is a lot number?
A lot number is the unique identifier assigned to a batch of material that was produced, handled and tested as one unit; it links a vial to its certificate of analysis.
Why lot numbers matter
Analytical results describe a specific batch, not a product in general. The lot number is what connects the vial in your hands to the test results for the batch it came from. Without it, a certificate of analysis cannot be matched to anything.
KPV lot numbers
Every KPV vial label carries a lot number such as KB-96378. The same number appears on the laboratory certificate and names the lot's page in the COA archive, for example /coa/kb-96378/.
Lot numbers and laboratory reference numbers
The testing laboratory also assigns its own reference numbers to each submitted sample: certificate number, accession number where issued, and a verification access code. They are listed on each KPV lot page with the lot number, so a certificate can be cross-checked with the laboratory.
Looking up a lot
Enter the lot number from your vial at kpv.bio/verify to see that lot's results.