COA Checker
Paste a peptide lab report link to see if it's verifiable, who published it, and whether the numbers hold up. Free, no sign-up.
How to read a peptide COA
- Lab and test number. A real third-party report names the lab and has a test or job number you can look up.
- Verification key. Labs like Janoshik and Chromate give each report a key. Enter it on the lab's verify page and compare.
- Sample description. Product, amount, vial and cap colors should match the vial you received.
- Test date and batch. The report should be recent and for the batch printed on your vial.
- Purity (HPLC). 98% or higher is typical for good research peptides.
- Quantity. The measured mg should be close to the label; more than 10% under is a problem.
- Identity. A mass spec (MS) result confirms the peptide is what the label says.
COA FAQ
How do I know if a peptide COA is real?
Get the report from the lab, not just the vendor. Labs like Janoshik and Chromate host each report on their own site with a test number and verification key. Enter the key on the lab's verification page and confirm the sample name, date, purity and amount match the copy you were given and the vial you received.
What should a good research peptide COA show?
The testing lab's name, a test or job number, the test date, the sample description (product, amount, vial and cap color), purity by HPLC (98% or higher is typical for good vendors), the measured amount compared with the label, and ideally an identity check by mass spectrometry.
Is a COA on Google Drive or a vendor's website trustworthy?
It can be, but those files can be edited or swapped. Treat them as a starting point and ask the vendor for the lab's verification link or key so you can confirm the report on the lab's own website.
What is COA reuse?
Some sellers post a lab report that was actually ordered by a different vendor, or for a different batch. That's why this checker compares the report with the vendors' published lab results and warns you if it belongs to someone else.
What does underdosed mean on a COA?
The lab measured less peptide in the vial than the label says. More than about 10% below the label means you're paying for peptide that isn't there.