PepCompass

Vial Confidence

Verify your COA in 60 seconds

Enter the numbers from your Certificate of Analysis and get an instant, plain-language confidence read, so you know whether to trust the vial before you ever use it.

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Your COA details

%
Identity confirmed by mass spectrometry?
HPLC chromatogram image included (not just a number)?
Intended for injection?
EU/mg
Residual-solvent panel present (TFA / acetonitrile / DMF)?
Batch number matches the vial label?
A test date is shown on the COA?

Your confidence report

Fill in the COA details and your live score, red flags, and supplier questions appear here.

Trustworthy supplier signals

  • Provides a batch-specific COA (not a generic one) for the exact vial you receive
  • Uses a named, ISO 17025 / A2LA-accredited third-party lab
  • Shows full HPLC chromatograms and mass-spec identity, not just a number
  • Reports endotoxin (EU/mg) for anything intended for injection
  • Clear contact info, refund/reship policy, and verifiable reviews

Walk-away red flags

  • Only a purity percentage with no chromatogram or lab name
  • The same 'stock' COA reused across many different products
  • No endotoxin testing on injectable products
  • Batch number on the COA doesn't match the vial
  • Pressure tactics, no contact details, or 'too good to be true' pricing

Educational only. A strong COA reduces risk but does not guarantee safety, sterility, or legality. Research use only, not medical advice.

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