Verification
How testing works
Two named laboratories per batch - Janoshik and Freedom Diagnostics. One on arrival, one from a real order placed against our own stock. Nothing is listed until both agree and the certificate is published.
The four steps
Vendor vetted
We only buy from vendors with a documented record across many independently assayed batches - before a single vial is ordered.
Janoshik
Identity, purity and mass, measured by HPLC-MS-MS on arrival.
Second lab
An order is placed against our own stock and the material re-tested by the other laboratory.
Published
The certificate is published against the lot number printed on the box.
Vetting the vendor, not just the vial
Most suppliers test what they already bought. That catches a bad batch after the money has moved, and it tells you nothing about whether the next one will be clean.
We start a step earlier. A vendor has to have a documented record across many independently assayed batches before we place a first order — not one clean certificate, but a history: consistent purity, accurate fill against label, no endotoxin failures, and standing that has held up over time. Vendors with a thin record, a single good run, or a history of being delisted do not make the list, however good the price is.
Then we test anyway.
Why twice
A single test proves what was in one vial on one day. Testing on arrival tells us whether a batch matches what was ordered. Re-testing from a real order — material pulled the same way a customer's would be, from the same shelf, in the same packaging — tells us whether what we ship matches what we received.
Those are different questions. Most suppliers answer only the first.
What the certificate covers
Each Certificate of Analysis records three things measured by HPLC-MS:
- Identity — that the material is the compound named.
- Purity — the proportion of the sample that is that compound.
- Mass — how much is actually in the vial, against what the label says.
Both tests are run by Janoshik Analytical and Freedom Diagnostics — named, independent, and not an in-house bench. Every certificate carries the laboratory's own reference for the lot it covers. Our published threshold is 99%. Certificates are published against the lot number printed on the box, so the document and the material refer to the same batch. Nothing is anonymised or averaged across batches.
Finding your certificate
Match the lot number printed on the box against the published lots. Every lot is also listed on the published lots page, and linked from each material's page in the catalog.
Stock rotation
First in, first out. Orders are fulfilled from the oldest qualifying lot, so material does not sit, and the lot you receive is traceable to the batch it came from and to that batch's published results.
Every lot we sell has two certificates behind it. Ask anyone else for theirs.
What it costs
Why we are not the cheapest
Independent testing is not a rounding error. A single assay runs about $500 per compound, per batch — and we run two, at two different laboratories. That is roughly $1,000 spent before a single vial is listed, on every batch of every material.
Spread across a batch, that lands on every vial. At fifty vials it is twenty dollars each; at a hundred, ten. It is the single largest reason our prices sit above sellers who publish no certificates at all — the gap is substantially the testing.
Figures are our own testing spend, not an industry average. Assay pricing varies by compound and by panel.