Certificates of Analysis
Batch certificates for listed peptides
EU Peptides lists research peptides with clear documentation. A batch is offered for sale only after its Certificate of Analysis has been checked against that batch. The lot number on the certificate must match the lot number on the vial. If the numbers are missing or do not match, that batch is not listed.
Every listed peptide meets our acceptance threshold of at least 99% purity by HPLC. The purity figure for a vial is the figure on that batch’s certificate, not a generic catalogue claim.
Where to find the certificate
When a certificate is available for a listed batch, it is published on the product page so you can review purity, identity, and testing details before ordering. Certificates are published whenever they are available for the relevant batch.
If you need the report for a batch number after purchase, or if a certificate is not yet shown on the page, contact EU Peptides with the product name and lot number. We answer from the product page and the paperwork for that lot.
How to read the file
- Lot number — must match the lot on the vial label.
- HPLC — the stated method used to assess purity under the certificate’s conditions.
- Mass spectrometry — included only where the certificate provides it, as supporting evidence of identity.
- Purity figure — use the value printed for that batch; do not substitute a result from another lot or a related peptide.
Neither HPLC nor mass spectrometry demonstrates receptor activity or a biological outcome. Certificates document analytical results for laboratory research material only.
If something does not match
If a certificate, lot number, or product detail does not look right, email us with the product name and lot. If a product does not match the specification on its published CoA, contact us with your batch number so we can investigate against the lot report.
Products are supplied for laboratory and analytical research only. They are not for human consumption, not a medicine, and not for veterinary use.