Lot numbers and batch traceability at XS
A lab report is only useful if it belongs to the vial in your hands. Lot numbers are how XS makes that connection.
What a lot is
A lot (or batch) is a quantity of one compound made and received together. Material within a lot is expected to share the same test results; a different lot needs its own testing.
How XS lot numbers work
- Each lot gets its own number, written as a short compound code plus a sequence, for example RETA-001, then RETA-002 for the next lot.
- The lot number is recorded when stock arrives at either studio, before anything is sold from it.
- Every order records which lot each vial shipped from, so your order history and the lot number on your vial point to the same batch.
- Each lot is sent to an outside lab for testing.
How to get your lot's report
- Find the lot number on your vial. It's also on your unboxing card and in Your shelf on the site.
- Request the report from the product page ("Request the lab report for lot …") or from Your shelf. If you're signed in through your member link, the request already knows your lot.
- We email the report for that lot.
What to check when it arrives
- The lot number on the report matches your vial.
- The testing lab and test date are named.
- Purity is supported by a chromatogram, and identity by a mass result. See how to read a peptide COA.
If anything doesn't match, email support@xspeptides.com with your order number and lot number.
Why small lots
XS keeps lots small, so each batch is tested before it's listed and stock turns over rather than sitting for long periods.
Questions
What is a lot number on a peptide vial?
It identifies the batch the vial came from. The lab report for that batch should carry the same lot number.
How do I get the lab report for my vial?
Request it from the product page or from Your shelf on xspeptides.com, and we email the report matched to your lot number.
What if the lot number on my report doesn't match my vial?
Email support@xspeptides.com with your order number and the lot number on the vial.