To read a peptide COA, check four things: the compound name and batch number, the HPLC purity percentage, the mass spectrometry result confirming identity, and the issuing lab and date.
Reading it section by section
- Compound and batch: confirm the name matches your product and the batch number matches your vial.
- HPLC purity: the purity percentage, ideally with a chromatogram showing a single dominant peak.
- Mass spectrometry: the measured molecular weight, which should match the peptide's expected weight.
- Lab and date: who performed the analysis and when, ideally a third-party lab.
What each part tells you
Together, these confirm the two things that define a peptide: it is the right molecule (identity, from mass spec) and it is as pure as claimed (purity, from HPLC). The batch match ties those results to what is actually in your hand.
Browse research-grade peptides
Every Axis compound is third-party tested to 99.4%+ purity, with a certificate of analysis on every batch.
Putting it to use
Reading a COA is the practical core of verifying purity. If any part is missing, or the batch does not match, treat that as a gap worth questioning.
Key takeaways
- Check the compound name and batch number first.
- Read the HPLC purity percentage and look for a single peak.
- Confirm the mass spectrometry weight matches the expected value.
- Note the issuing lab and date; prefer third-party testing.
A note on research use
The peptides supplied by Axis Peptide Labs are reference compounds for laboratory and research use only. They are intended for qualified researchers working in academic, institutional, and analytical settings. They are not drugs, foods, cosmetics, or medical products, and they are not intended for human or veterinary consumption. Documented identity and documented purity are what matter most when sourcing a compound, both of which are published on the Axis certificates of analysis page.
