Janoshik Test Report Explained: What It Shows and How to Verify It
By Peptides & Coffee · Updated Oct 14, 2026 · About 6 minutes
A Janoshik report is a test result from Janoshik, an independent analytical lab in Prague, for one sample a client sent in. Each report has a task number and a unique key. Together they open the lab's own record at verify.janoshik.com, which should show the same sample, dates and results as the copy you were given. Paste both into our free COA checker to get the right record link.
What Janoshik is
Janoshik (Janoshik s.r.o.) is an independent analytical laboratory based in Prague, Czech Republic. It tests samples sent in by clients, which can be vendors, distributors or individual buyers, and publishes each report on its own verification site. No accreditation is printed on the reports we have seen, and we found no published ISO/IEC 17025 accreditation for the lab (checked Oct 7, 2026). Read the report as one lab's measurement of one sample.
The parts of a Janoshik report
| Task number | The lab's job number for this test, often written "Task #12345". It is sequential and not secret. |
|---|---|
| Unique key | A 12-character code printed on the report. The task number and key together open the record; one without the other is not enough. |
| Client | Who sent the sample in. This is not necessarily who made it. |
| Sample / declared name | What the client said the sample is, such as a compound name and labeled amount. The lab tests against that declaration. |
| Batch / lot | The lot or batch the client wrote down, if any. This is what you match against your vial label. |
| Dates | When the sample was received and when the report was issued. They should be in order and not in the future. |
| Results | The measured values: typically purity by HPLC and the amount of peptide found per vial, sometimes for several vials. Extra tests appear only when they're listed under the results. |
| QR code | Links to the record on Janoshik's verification site. Scan it, but check the domain it opens. |
Reading the results
- Purity (HPLC): the share of the UV-detected material that is the main peak. It is a relative figure and doesn't measure weight. See what purity figures mean.
- Content per vial (mg): how much of the declared peptide the lab measured in the vial. Compare it with the labeled amount. When several vials are listed, the spread between them shows how consistent the filling was.
- Blends: a report for a blend lists a measured amount for each component separately.
- Identity: the lab measures the declared peptide; a result for the declared compound means the lab found and quantified it. If a report lists other tests, such as endotoxin, read each one's own result.
How to verify a Janoshik report
- Find the task number and unique key on the report.
- Open Janoshik yourself: go to janoshik.com/verify and enter the key, or open the record address
verify.janoshik.com/tests/<task>_<key>. - Check the domain. The record must be on janoshik.com or one of its subdomains. A site with "janoshik" somewhere else in its address (an extra word, a hyphen, another ending) is not the lab.
- Compare the fields with your copy: client, sample name, batch, dates, purity and content per vial should all match.
- Match the batch to your vial label.
If the record opens but shows a different sample, batch or result, the copy you have does not describe what the lab tested. If the lab has no record for that task and key, consider the report unverified.
Checking one with our checker
Paste the QR code's link, or type something like "Janoshik #12345 key ABCD1234EFGH", into the free COA checker. It reads the task number and key, checks that any link is on Janoshik's real domain, and gives you the direct link to the lab's record. Janoshik blocks automated lookups, so the checker can't confirm the record for you: open it and compare it yourself.
A few format notes the checker handles: a bare six-digit number could be a Janoshik task or an MDx search code, so it offers both; "#" or "Task" before the number means Janoshik; and a Janoshik task without its key can't be opened, so it asks for the key.
Janoshik-tested lots in our COA hub link the lab's record from the top of each lot page.
What a Janoshik report can't tell you
- It describes the sample the client sent. It says nothing about other lots.
- The sample name is the client's declaration; the lab reports what it measured against it.
- One lab's HPLC method is not the same as another's, so small purity differences between labs are normal.
- It is an analytical report, not a statement about any use of the material.
For a wider walkthrough of any lab's certificate, read how to read a peptide COA and how to verify a COA.
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FAQ
What is a Janoshik test report?
It is an analytical report from Janoshik, an independent lab in Prague, for one sample a client sent in. It lists the declared sample, the client, dates and the measured results, usually HPLC purity and the amount found per vial.
How do I verify a Janoshik report?
Enter the unique key at janoshik.com/verify, or open verify.janoshik.com/tests/ followed by the task number, an underscore and the key. Check that the record is on janoshik.com and matches your copy and your vial's batch.
What is the difference between the task number and the key?
The task number is the lab's sequential job number. The unique key is a 12-character code that, together with the task number, opens that report's record. You need both.
Can your checker confirm a Janoshik report automatically?
No. Janoshik blocks automated lookups, so the checker reads the task number and key, checks the domain and gives you the lab's record link. You open it and compare the record yourself.
Who is the client on a Janoshik report?
The person or company that sent the sample to the lab. It is not necessarily the manufacturer of the material.
Is Janoshik ISO 17025 accredited?
No accreditation is printed on the reports we have seen, and we found no published ISO/IEC 17025 accreditation for the lab when we checked on Oct 7, 2026.
Related guides
This guide explains how to read and check analytical chemistry documents. It is not advice on using any product. Products referenced on this site are for laboratory research use only and are not for human or veterinary consumption.