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Understanding Certificate of Analysis (CoA) Documents

What is a CoA?


A Certificate of Analysis (CoA) is an independent laboratory document that verifies the identity, purity, and quality of a specific batch of research compound.


Key Metrics


HPLC Purity

High-Performance Liquid Chromatography measures the percentage of target compound versus impurities. PeptideLab requires ≥99% purity for all catalog compounds.


Mass Spectrometry Identity

Mass spec confirms the molecular weight matches the expected peptide sequence, verifying compound identity.


Batch ID

Every CoA is tied to a specific batch ID. Cross-reference the batch ID on your product label with our CoA Library.


How to Use CoA Documentation


  • Locate your batch ID on the product vial label
  • Search our CoA Library by batch ID or product name
  • Download or request the PDF for your laboratory records
  • Include CoA reference in your research documentation

    • Research Use Only


    CoA documentation supports laboratory research workflows. Products are not approved for human or veterinary use.