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🔬 General ResearchPublished: October 19, 2026

How to Read and Verify a Peptide COA

“A Certificate of Analysis (COA) is the record of what a specific peptide batch was tested for and what the results were. This guide explains each section of a COA, the warning signs of an unreliable one, and how to verify a Geno Bio Canada COA by lot number.”

Peptide vial product illustration

Legal & Laboratory Compliance Notice

FOR IN-VITRO LABORATORY RESEARCH ONLY: This scientific publication is provided strictly for academic and biochemical reference by certified researchers. Materials and compounds referenced are NOT for human consumption, veterinary use, drug manufacture, or direct clinical administration. Statements have not been evaluated by Health Canada or the FDA.

Scientific Research Overview

Abstract & Executive Summary

A Certificate of Analysis is the single most useful document a research peptide supplier can provide. It is the written record of which tests were run on one production batch, which methods were used, what the acceptance limits were and what results were obtained.

Reading a COA well takes only a few minutes once you know where to look. This guide walks through each section in order, lists the warning signs of an unreliable certificate, and shows how to verify a Geno Bio Canada COA online.

The 3 second check

  Vial lot number   :  GB-0000
  COA lot number    :  GB-0000
                       -------
  Match?            :  YES  ->  keep reading
                       NO   ->  this COA does not apply

What a COA Is

A COA is issued for one production batch, identified by a lot number. It lists the tests run on that batch, the method used, the acceptance limit and the result.

A COA only describes the batch printed on it. The first check is always that its lot number matches the vial in front of you.

The Sections of a COA, in Order

  • Product and lot details: product name, vial size, lot number and certificate number.
  • Appearance: for lyophilized peptides, typically a white to off-white powder or cake.
  • Purity (HPLC): the percentage of the target peptide, ideally with the chromatogram attached.
  • Identity (mass spectrometry): the observed mass shown next to the expected mass.
  • Microbiological results: sterility and bacterial endotoxin, where tested.
  • Storage conditions: how the batch should be stored, such as frozen or refrigerated and away from light.
  • Dates: when the testing was done and when the certificate was issued.
  • Research use statement: confirmation that the material is for laboratory research only.
  • Reading Each Result

  • Specification vs result: every test should show the acceptance limit (for example, purity of at least 98%) next to the actual result. A result without a limit is hard to judge.
  • Method: the method name, such as RP-HPLC or ESI-MS, tells you how the number was produced.
  • Raw data: an attached chromatogram or mass spectrum is stronger evidence than a number typed into a table.
  • Mechanism of Action

    Warning Signs of an Unreliable COA

  • No lot number, or a lot number that does not match the vial.
  • A purity number with no chromatogram or raw report behind it.
  • No identity result. Purity without identity does not confirm the molecule.
  • The same COA reused for different products or batches.
  • No test date, or a date long before the batch was made.
  • No acceptance limits, so there is nothing to compare the result against.
  • How to Verify a Geno Bio Canada COA

  • Find the lot number printed on your vial.
  • Open the Certificates page and enter the lot number.
  • Check that the product name, vial size and lot number shown match your vial.
  • Review the purity, identity and microbiological results, and open the attached HPLC and mass spectrometry reports where provided.
  • If a lot number does not return a result, contact our team through the Contact page with the lot number and your order number.

    Related Reading

  • What Does 99% Peptide Purity Actually Mean?
  • How Peptides Are Tested: HPLC, Mass Spectrometry, Identity and Content
  • Geno Bio Canada products are sold for laboratory research use only and are not for human or animal consumption.

    Key Study Highlights

    ✓

    One batch only

    A COA covers the lot number printed on it, nothing else

    ✓

    Purity and identity

    Look for both an HPLC result and a mass spectrometry result.

    ✓

    Raw reports

    Chromatograms and spectra are stronger evidence than a number alone.

    ✓

    Verify online

    Check any Geno Bio Canada lot on the Certificates page.

    Scientific FAQs

    Certificate of Analysis, the test record for one production batch.
    No. Each lot is tested on its own, so only the matching lot's COA applies.
    It is printed on the vial label and can be entered on the Certificates page to view that batch's results.
    It is the minimum or maximum value a result must meet to pass, such as a purity of at least 98%. The actual result is shown next to it.
    It shows the raw HPLC trace behind the purity number, so you can see the main peak and any impurity peaks for yourself.

    References

    1. U.S. Food and Drug Administration (2016).
      Q7 Good Manufacturing Practice Guidance for Active Pharmaceutical Ingredients
      FDA Guidance for Industry
    2. United States Pharmacopeia (2022).
      Harmonized Standard: General Chapter 621 Chromatography
      USP Notice of Adoption
    3. U.S. Food and Drug Administration (2012).
      Pyrogen and Endotoxins Testing: Questions and Answers
      FDA Guidance for Industry
    4. International Council for Harmonisation (2023).
      ICH Q2(R2) Validation of Analytical Procedures
      ICH Guideline

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