Every batch, tested before it's listed.
We test by HPLC (purity) and mass spectrometry (identity) at an independent lab, then attach the results to the batch number printed on your vial.
Certificate of Analysis lookup
Enter the batch number printed on your vial label to see its purity and test data. This is a live demo — try one of the sample batch numbers below.
What happens before a batch goes up for sale
Sample pulled
A sample is pulled from every production batch before it's released for sale.
Independent lab testing
The sample is sent to a third-party lab for HPLC purity analysis and mass-spec identity confirmation.
Pass / fail threshold
Batches below our published purity threshold are rejected and never listed — no partial passes.
Keeping a peptide stable after it arrives
Store lyophilized vials cold
Keep unreconstituted vials refrigerated (2–8°C) or frozen for longer-term storage, out of direct light.
Reconstitute just before use
Once reconstituted with bacteriostatic or sterile water, most peptides are stable under refrigeration for a limited window — refer to the specific compound's data sheet.
Avoid freeze-thaw cycles
Repeated freezing and thawing degrades peptide structure faster than steady refrigeration.