Every tested lot ships with its certificate, its batch number and a key you check on the lab’s own site. See the certificates →

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Ouralusouralus
How we test

Purity is a measurement

Every batch is held to one standard — independent testing by Janoshik for identity and purity, issued as a certificate of analysis you can verify by key. 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

Lots are independently tested for identity and purity, then issued a certificate you can verify. A lot that misses spec doesn't ship.

  1. 01

    Identity

    · Janoshik

    An independent lab confirms the compound is what the label says — by retention, not by trust.

  2. 02

    Purity · assay

    Third-party

    Janoshik quantifies the compound and resolves related substances by . This is the purity figure the certificate carries.

  3. 03

    Certificate of analysis

    Published per tested lot, verifiable

    The result is issued as a certificate for that lot and published with a unique key you can confirm at janoshik.com/verify — never filed away.

How verification works

Independently tested, verifiable by you

We don't ask you to trust a label. Every batch is tested by an independent lab and published with a key you can check yourself.

  1. 01

    Source

    Lyophilized powder

    Each compound is supplied as a lyophilized (freeze-dried) powder, handled for laboratory research use only — not for human or animal consumption.

  2. 02

    Independent testing

    Third-party lab · Janoshik

    Every batch is analysed by Janoshik, an independent laboratory, by for identity and purity. We do not test our own material.

  3. 03

    Per-lot published

    Certificate of analysis

    Janoshik issues a certificate of analysis for that specific batch, stating the assayed purity. We publish it — with the batch and analysis date — on the product's page.

  4. 04

    Verify it yourself

    janoshik.com/verify

    Each report carries a unique key. Enter it at janoshik.com/verify to confirm the certificate directly with the lab — you never have to take our word for it.

The certificate

What a certificate of analysis includes

Certificate of AnalysisIllustrative format
Product
Single compound · named where tested
Lot №
—
Test date
—
ParameterMethodResult
Identity (Janoshik)— · where tested
Purity (assay), third-party— · where tested

This is an illustrative format. Every published certificate carries a real assayed purity and a unique verify key — see any product page to check one at janoshik.com/verify.

The method

The method, step by step

Identity and purity are both determined by high-performance liquid chromatography (), by Janoshik, an independent laboratory. Identity is confirmed by retention behaviour against a reference standard. Purity is the assayed percentage of the named compound in that lot, with related substances resolved and reported in the same run.

The figure published on a product page is the figure Janoshik issued for that specific lot. We do not round it, restate it in our own words, or average it across lots. If you want to check one, every report carries a unique key you can enter atjanoshik.com/verifyto confirm the result with the laboratory directly, without involving us.

What this standard covers — and what it does not.

A published certificate from us reports two things: identity and assayed purity, both by. It does not report heavy-metal content, microbial or endotoxin analysis, or sterility. We do not run those assays and we do not claim them anywhere on this site.

Where a compound has no published certificate, no purity figure is claimed for it. Its page says so plainly rather than substituting a general statement about our standard for a result we do not have.

Who stands behind this page.

This standard is maintained and reviewed by Jacob Pierce, founder of Ouralus LLC. 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.

The checkable part of our claim was never who wrote it. It is the certificate. Every published report is issued by a third-party laboratory and carries a key that confirms the result with that laboratory, not with us.

Related reading: How to read a certificate of analysis· How to verify research peptide purity

Last reviewed: July 25, 2026 by Jacob Pierce, founder.

Tested · traced · published

Purity you can check yourself.

Browse the catalogue of research peptides and compounds — each one held to this standard, lot by lot. For laboratory research use only.

Browse the catalogue →