Janoshik reports published per lot. Verify any report with its key. See the certificates →

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How we test

Purity is a measurement

Janoshik reports published per lot. Verify any report with its key. The lab reports purity (by ; the report does not print the method) and how much of the compound is in the vial. It prints no identity result. Where a result misses spec, the lot is rejected. Not relabelled, not discounted — rejected.

  • 3rd-partyIndependent lab
  • Per-lotCertificate
  • Off-specRejected, not relabelled
Vial on a laboratory bench — independent testing
The process

From intake to release

An independent lab reports purity and net content, then issues a certificate you can check. A lot that fails does not ship.

  1. 01

    Net content

    Janoshik Analytical

    An independent lab measures how many milligrams of the compound are in the vial. That number is the quantity on the certificate.

  2. 02

    Purity · assay

    Third-party

    Janoshik measures how much of the sample is the compound. That number is the purity on the certificate.

  3. 03

    Certificate of analysis

    Published per tested lot, verifiable

    The lab issues a certificate for that lot. We publish it with a verify key. You can check the key at janoshik.com/verify.

How verification works

Independently tested, verifiable by you

You do not have to trust a label. Each report carries a key you can check on the lab's own site.

  1. 01

    Source

    Freeze-dried powder

    Each compound comes as a freeze-dried powder. For laboratory research use only. Not for human or animal consumption.

  2. 02

    Independent testing

    Third-party lab · Janoshik

    Janoshik is an independent lab. It reports purity and net content. We do not test our own vials.

  3. 03

    Per-lot published

    Certificate of analysis

    Janoshik issues the certificate. It shows the purity. We post it on the product page with the batch and test date.

  4. 04

    Verify it yourself

    janoshik.com/verify

    Each report has its own key. Enter it at janoshik.com/verify. The lab shows you its own copy. You do not have to take our word for it.

The certificate

What a certificate of analysis includes

Certificate of AnalysisIllustrative format
Product
Compound or blend · named where tested
Lot №
—
Test date
—
ParameterMethodResult
Net contentThird-party assay, mg per vial— · where tested
Purity (assay), third-party— · where tested

This is a sample layout. Each real certificate shows a real purity and its own verify key. Open any product page to check one at janoshik.com/verify.

The method

The method, step by step

Janoshik, an independent lab, reports purity (by , a method the report itself does not name) and the amount of the compound in the vial. Purity is the share of the sample that is the named compound. Other substances in the sample are measured in the same test.

The purity on a product page is the exact number Janoshik gave for that lot. We do not round it or average it. Each report has its own key. To check one, enter the key atjanoshik.com/verify. The lab will confirm the result for you.

What we test, and what we do not

Our certificates report two things: purity, where the report prints a purity row, and net content in milligrams per vial. They print no identity result. They do not cover endotoxin, sterility or heavy metals, or microbes. We do not run those tests. We do not claim them anywhere on this site.

If a product has no certificate yet, we show no purity number for it. Its page says so.

Who stands behind this page.

This standard is maintained and reviewed by the Ouralus team. It is not reviewed by a licensed practitioner, and no page on this site is written or reviewed as health information — everything here describes a laboratory testing standard for research materials.

You do not have to trust us. Trust the certificate. An outside lab writes each one. Its key lets you confirm the result with that lab.

Related reading: How to verify a certificate of analysis· HPLC vs mass spectrometry

Last reviewed: July 25, 2026 by the Ouralus team.

Tested · traced · published

Purity you can check yourself.

Shop research peptides and compounds. Each one meets this standard. For laboratory research use only.

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