Certificates of Analysis

Certificates of analysis now live in the Lot Ledger

We no longer keep a separate certificates page. Every certificate is attached to the specific lot it describes, in the Lot Ledger, alongside the rest of that lot's release panel.

That change is deliberate. A certificate detached from a lot number cannot be checked against the vial in your hand, and a page of loose certificates is the format most easily reused across batches. Each record in the ledger carries its lot number, both testing laboratories, their report identifiers, and links into each laboratory's own system so you can confirm the result without relying on anything we host.

To check the vial you have

Read the lot number printed on the label and enter it in the Lot Ledger. If the number on your vial does not appear there, or the details do not match, tell us and do not use the vial.

If you are evaluating vendors

We wrote How to read a certificate of analysis to be useful regardless of who you buy from. It covers what a real certificate contains, how reused and altered certificates are usually spotted, and which measurements are commonly skipped.