How to verify a Chromate COA
Check a certificate with the laboratory that issued it, not with the seller. These are the steps we use ourselves (check L3 in How we rate). Research use only.
- Certificates confirmed
- 12
Certificates confirmed
- Vendors confirmed
- 3
Vendors confirmed
Four steps
Find the code on the certificate
Each report prints a report number and a key.
Open the laboratory's own lookup
Enter them at chromate.org/verify. Type the address yourself rather than following a link from the seller, and make sure the page is on the laboratory's own domain.
Compare the result with the vendor's copy
A real key returns the report. The product, lot, client name, test date, purity and quantity should all match; any difference in these is a material difference.
Run the control check
An invented key returns 'invalid'. Change one character of a real code and look it up again: a lookup that answers every code proves nothing.
chromate.org/verify → (opens in new tab)
Our check (L3, pass): On 2026-10-22 chromate.org/verify returned reports 24763, 33200 and 40596 for their keys and 'invalid' for an invented key.
What a confirmation is worth in our scores
On a Chromate certificate, a printed key earns +1.5 and a key we confirm at the laboratory earns another +1.5 under our lab rule. Only confirmed certificates count toward the testing gate (rule A9). We have confirmed 12 of 12 certificates naming Chromate, from 3 vendors; the vendors are listed on the Chromate profile. For what every field on a certificate means, read how to read a peptide COA.
Verifying Chromate: Frequently Asked Questions
Can I verify a Chromate COA online?
Yes. Each report prints a report number and a key. Enter them at chromate.org/verify. A real key returns the report.
What should an invented Chromate code return?
An invented key returns 'invalid'. We ran this control when we checked the lookup on 2026-10-22.
How many Chromate certificates has Peptide Source Review confirmed?
12 of the 12 certificates naming Chromate on listed vendors' pages were confirmed against the laboratory's own record, from 3 vendors.
What tier is Chromate?
Chromate is tier B+ in our lab directory, graded on six published checks. Check L3 is whether its reports can be confirmed with the laboratory.