In short: A peptide Certificate of Analysis (COA) documents a specific batch: its identity (confirmed by mass spectrometry), its purity (measured by HPLC, e.g. ≥99%), and traceability details like batch number and test date. A COA that matches your vial is the core proof of quality.

The sections that matter

Identity — mass-spectrometry data confirms the compound is what the label says.
Purity — an HPLC chromatogram and a percentage figure show how much of the sample is the target peptide.
Batch and date — the batch number links the document to your specific vial, and the test date shows how current the analysis is.

Matching the COA to your vial

The batch number on your vial should match the COA. Without that link, a purity figure is just a claim. Every compound in the MyoLabs Research Series is batch-documented; see the Lab Reports page for examples.

Frequently Asked Questions

What does a peptide COA show?

It documents identity (mass spec), purity (HPLC percentage), and batch traceability for a specific production lot.

What purity is shown on a good COA?

Research-grade peptides are commonly ≥98–99% pure; MyoLabs targets ≥99% and publishes batch documentation.

Why does the batch number matter?

It ties the test report to the exact vial you received, so the purity data actually applies to your material.

Research Use Only. MyoLabs products are supplied strictly for laboratory and research use. They are not medicines and are not for human or animal consumption, diagnosis, treatment, or prevention of any condition. Always comply with the laws of your jurisdiction.