A certificate of analysis (COA) is a document from a testing laboratory that reports a peptide's identity, batch or lot number, measured purity, and test methods. Because you cannot judge a peptide by eye, the COA is the primary proof of what a product actually is.
What a COA includes
A useful certificate of analysis documents:
- Compound name and the intended sequence.
- Batch or lot number, so results tie to the exact material you received.
- Measured purity, usually as an HPLC area percentage.
- Test methods, commonly HPLC for purity and mass spectrometry for identity.
- Date and issuing laboratory.
Why it matters
Peptide purity and identity are invisible without testing. The COA turns those invisible properties into documented, checkable evidence. It is how a buyer confirms that the compound is what the label claims and as pure as promised.
Where to find Axis COAs
Every Axis Peptide Labs compound ships with a batch-specific certificate, and current results are published on the test results page. If you ever need a specific batch, the batch number on your label ties directly to its certificate.
Key takeaways
- A COA is a lab document reporting identity, batch, purity, and methods.
- It should list the compound, batch, purity %, methods, date, and lab.
- It is the proof that a peptide is what the label says.
- Every reputable research peptide ships with a batch-specific COA.
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.
