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Third-party HPLC + mass spec on every lot
75 lots publishedISO/IEC 17025 laboratories

Check the certificate
before you buy the vial.

Certus publishes the full assay panel for every lot we release — HPLC purity, mass-spec identity, endotoxin and sterility — indexed by the lot number printed on the label. Type a code below and read the certificate yourself. No account, no email, no sales call.

75 lots on file.Browse every certificate

99.31 %
Average HPLC purity across released lots
75
Certificates published and searchable
100 %
Lots with endotoxin and sterility data
Certificate of analysis
Released

MOTS-c

CP-MOTSC-2607A

99.89%

HPLC purity

Tested by
Janoshik Analytical
Accreditation
ISO/IEC 17025:2017
Test date
Jul 24, 2026
Net peptide
87.6 %
Endotoxin
< 0.88 EU/mg
Sterility
No growth

All release criteria met

Read the full certificate

Live record — updated 2 months ago

Most requested

What researchers order most

The compounds with the highest reorder rates in our catalog. Each one carries at least two published lots so you can compare batch-to-batch consistency, not just read a single flattering certificate.

View all compounds
Best sellerSave 23%

Growth Hormone Secretagogues

Ipamorelin

Selective ghrelin receptor agonist

≥ 99.0 % HPLC·COA on file

From

$48$62

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Regenerative & Repair

TB-500

Thymosin beta-4 fragment (17-23)

≥ 99.0 % HPLC·COA on file

From

$62$79

Best sellerSave 24%

GLP & Metabolic

GLP-2 (TZ)

Dual GIP/GLP-1 receptor agonist

≥ 99.0 % HPLC·COA on file

From

$110$145

New

GLP & Metabolic

GLP-3 (RT)

Triple GIP/GLP-1/glucagon receptor agonist

≥ 98.0 % HPLC·COA on file

From

$135

Longevity & Cellular

SS-31

Elamipretide, cardiolipin-targeting tetrapeptide

≥ 98.0 % HPLC·COA on file

From

$95

Regenerative & Repair

GHK-Cu

Copper tripeptide-1

≥ 99.0 % HPLC·COA on file

From

$58

Cognitive & Neuro

Semax

ACTH(4-10) analogue with Pro-Gly-Pro extension

≥ 99.0 % HPLC·COA on file

From

$58

Why the certificate matters

Anyone can claim 99 % purity.
Far fewer will show you the chromatogram.

The gap between a supplier who tests and a supplier who says they test is invisible at the point of sale — which is exactly why we made every lot record public and searchable before you spend anything.

  • Dual-method release

    RP-HPLC for purity and ESI LC-MS for identity on every lot, plus a third assay where the compound has a known failure mode.

  • Lot-matched certificates

    The certificate you read is the certificate for the vial you receive. Look it up by lot number before you order, not after.

  • Independent laboratories

    Release testing is run by ISO/IEC 17025 accredited third parties. We publish their name and accreditation, not just a number.

  • Endotoxin and sterility

    LAL endotoxin quantified in EU/mg and USP <71> sterility on every lot, with the measured figure reported — not just a pass.

  • Cold chain, end to end

    Lyophilised at -20 °C, held at -20 °C, shipped in an insulated cold pack. Storage conditions are on the certificate.

  • Same-day dispatch

    Orders placed before 1:00 PM PT on a business day leave the same day, tracked, from our Reno facility.

How it works

Three steps, and none of them require trusting us

The whole point of lot-level verification is that it works adversarially. You should be able to check a Certus vial against a Certus certificate without taking a single claim on this page at face value.

Verify a lot now
  1. 01

    Read the lot code off the vial

    Every label carries a code in the form CP-COMPOUND-YYMM plus a run letter. It is printed, not stickered on afterwards, and it is unique to one synthesis run.

  2. 02

    Look it up here, before or after you order

    The lot resolves to its own page with the full assay panel — method, specification and measured result for each line, plus the testing laboratory and its accreditation number.

  3. 03

    Check the numbers against the spec

    Not just the purity figure. Net peptide content governs your concentration; endotoxin governs whether the material is usable in cell culture. Both are on the certificate, with the measured value rather than a pass mark.

Latest releases

Lots that cleared testing recently

A running ledger of every batch that passed release. Retired and superseded lots stay listed — an archive that only shows current stock is a catalog, not a record.

All lab reports
LotCompoundPurityEndotoxinTestedLaboratory
CP-MOTSC-2607AMOTS-c99.89 %< 0.88 EU/mgJul 24, 2026Janoshik AnalyticalCertificate
CP-THYMOSO9-2607AThymosin Alpha-198.62 %< 0.57 EU/mgJul 24, 2026Aurum BioanalyticsCertificate
CP-DIHEXA-2607ADihexa99.75 %< 0.89 EU/mgJul 22, 2026Colmaric AnalyticalsCertificate
CP-TESAMOS2-2607ATesamorelin99.71 %< 0.17 EU/mgJul 22, 2026Janoshik AnalyticalCertificate
CP-GHKBPCTM-2607AGHK-Cu + BPC-157 + TB-500 + KPV Blend99.50 %< 0.72 EU/mgJul 21, 2026Aurum BioanalyticsCertificate

From the bench

What buyers say when the certificate checks out

  • “The first supplier I have used where the COA line items actually match what I would run myself. Net peptide content on the label instead of cake weight saved me a re-titration.”

    Analytical chemist

    Contract research organisation, Boston

  • “We buy the same compound quarterly and I compare lot certificates side by side. Batch-to-batch variance has been under half a percent, and the archive makes that checkable rather than something I have to take on faith.”

    Laboratory manager

    University core facility

  • “Endotoxin reported as a measured figure rather than a pass mark is the detail that won me over. In cell culture that number is the difference between a clean result and a confound.”

    Postdoctoral researcher

    Immunology group

Reviews are submitted by verified purchasers and shown with role and institution type rather than full names, at reviewers’ request.

Research library

How to evaluate any peptide supplier, including this one

Reference material on certificates, analytical methods and handling. Written to be useful whether or not you buy from us — if it makes you better at auditing suppliers, it makes us easier to choose.

Read the library

Common questions

Before you order

Still unresolved? Talk to someone who works in the lab — not a chat queue.

  • Every vial we ship carries a lot number on its label. That code resolves to one batch record on this site, with the full assay panel for that specific run — not a representative sample from a previous batch. You can look up any lot before you order, which is the point: verification is only a trust signal if it works before you have spent anything.

  • Independent laboratories accredited to ISO/IEC 17025. The testing laboratory's name and accreditation appear on each certificate rather than a generic 'third-party verified' badge, because a badge you cannot check is not evidence.

  • No, and we would rather say so. HPLC purity is an area-percent measurement of UV-absorbing species — it does not tell you how much peptide is in the vial. That is net peptide content, which we report separately and use to label vial strength. A 10 mg vial contains 10 mg of peptide, not 10 mg of cake.

  • No. Everything we sell is supplied strictly for laboratory research use. These are not drugs, supplements or medical devices, they have not been evaluated by the FDA, and they are not intended for human or veterinary administration of any kind. We are a research chemical supplier, not a compounding pharmacy.

  • Lyophilised, in an insulated cold pack, tracked, by UPS or FedEx from our Mount Pleasant, SC facility. Orders ship once payment is confirmed. Free cold-chain shipping over $200.

  • Send us the lot number and we will replace the order and pull the batch while we investigate. That commitment is only meaningful because the certificate is public and specific enough to check us against — which is exactly why we publish it that way.

Pick a compound. Read its certificate first.

34 compounds across 7 research categories, 75 published lots, and free cold-chain shipping over $200.