The short version
Start with the original report linked from the applicable lot record. It identifies the issuing laboratory, sample, reported methods, and analysis date. The original report remains the source for what was measured; a website badge is not a substitute.
Use a supplied verification link or the laboratory's independently published contact details to confirm the report. If documentation is missing or inconsistent, ask support before relying on a displayed result. Published historical reports remain available after a lot sells out.
The lot assigned to your order is listed on your order status page and in your shipping confirmation. Use that code to find its entry.
What gets tested, and what it means
A single certificate can cover more than one type of test. Each type answers a different, narrow question. It's just as important to know what a passing result doesn't tell you as what it does.
| Test | What it checks | What it doesn't tell you |
|---|---|---|
| Identity | Confirms the molecule in the sample matches what it's supposed to be, usually by a test called mass spectrometry. | Doesn't confirm the exact amount in the vial, and doesn't screen for every possible unrelated substance. |
| Purity | Reports purity under the stated analytical method, often HPLC peak-area purity. | Doesn't confirm sterility or endotoxin level. A high purity reading says nothing about either. |
| Endotoxin | Measures bacterial endotoxin (a leftover from certain bacteria) in the sample, usually by an LAL assay. | A low endotoxin reading is not the same as a sterile sample. The two are measured separately. |
| Sterility | Confirms the tested sample showed no live microbial growth under the method used. | Sterility testing uses up the sample and is run on one sample from the lot, not on every vial. It supports confidence in the lot, but it isn't a guarantee for each individual vial. |
For each lot with a lab report, we publish exactly which of these tests were run. Not every lot carries every test, and we don't imply a test was run when it wasn't. The certificate lists what was actually done.
Batches with a lab report link to it; batches without one are clearly marked before purchase. For those, identity and purity are not verified, and we show no test results for them.
What a certificate is, and isn't
A certificate describes the sample tested, by the method used, at the time it was tested. It's a record of that lab's own findings. It isn't a claim about anything beyond what the listed methods measure, and it isn't a statement about how a compound behaves once it leaves our facility.
How to verify a certificate
Use the verification link supplied with the lot record, or independently obtain contact details for the laboratory named on the original report.
| Step | What to do |
|---|---|
| 1 | Find your lot code on your order status page or in your shipping confirmation. |
| 2 | Look it up on lab results. |
| 3 | Use the lab's verify link on that lot's page, or contact the lab directly using the information they publish, not ours. |
The issuing laboratory can explain its own report and verification process.
Older lots
When a lot sells out, its certificate stays published. If you're holding a vial from a lot that's no longer current, you can still look it up and verify it the same way.
Quantity and quality claims
Product size is a nominal quantity. Identity and purity tests alone do not establish the amount per vial. Quantitative content, sterility, and endotoxin claims each require their own appropriate evidence. There is no blanket purity percentage or sterility guarantee across the catalog.
See Quality assurance for specification scope, storage evidence, sample tracing, and independent testing concerns. The Returns policy explains the existing refund and reshipment remedies. Opening a vial for testing does not automatically invalidate a quality claim.
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