COA library & verification.
Reference guides for reading, verifying and archiving batch Certificates of Analysis.
Editor's picks.
All content
0 guides
No guides yet — check back soon.
Batch verification
Certificate of Analysis.
Every batch ships with a third-party HPLC and mass-spec Certificate of Analysis. Browse the live COA library to verify your lot.
Pair with
Related products.
FAQ
Frequently asked questions.
Where can I view BuyRetaUK COAs?
All current batch certificates are listed on our verification page and linked from each product.
Read: Understanding Certificates of Analysis →What purity should I expect?
Our research peptides are released at ≥99% HPLC purity unless otherwise stated on the product listing.
Read: Understanding Certificates of Analysis →Is HPLC the only purity test that matters?
HPLC is the primary purity metric, but identity (mass spec) and endotoxin testing are also important components of a complete COA.
Read: Understanding HPLC Testing →Are batches tested in-house?
Identity and purity are confirmed by independent third-party laboratories — not by us — so the result is impartial.
Read: Laboratory Quality Standards →