How to Verify a Peptide Certificate of Analysis
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A Certificate of Analysis is the batch-level record that connects a vial to its analytical testing. This guide explains how to read one and what to check before ordering research peptides in Europe.
What should a Certificate of Analysis contain?
- Product name: must match the compound on the vial label.
- Batch / lot number: must match the lot printed on the vial and on your order paperwork.
- Test date: shows how recent the analysis is for that lot.
- Analytical method: typically HPLC for purity; mass spectrometry where identity testing exists.
- Purity result: the measured value for that batch, not a generic marketing figure.
- Laboratory: the independent lab that performed the analysis.
- Verification link: a public report URL controlled by the testing laboratory.
How do you verify a Peptra Certificate of Analysis?
- Open the third-party report link from the matching product card or from the Lab Reports archive.
- Compare the batch number on the report with the vial label and your order paperwork.
- Check the available purity result and the test date for that batch.
- If anything does not match, contact Peptra before using the material in research.
What does a Certificate of Analysis not prove?
Purity testing is not identity confirmation unless an identity assay exists for that batch. A Certificate of Analysis also says nothing about suitability for human or veterinary use. Peptra Labs materials are supplied strictly for laboratory research use only.
What are the signs of a weak Certificate of Analysis?
- The same report reused across different products or lots.
- A screenshot or PDF hosted only by the supplier, with no lab-controlled verification page.
- No batch number, no test date, or a batch that does not exist in the supplier archive.
- Purity claims presented without a matching report for the commercial lot.
Related: Quality testing standards · Research-use policy · Lab reports archive