How research peptide identity and purity are verified, and how to read the supporting analytical documentation.
A vial labelled 10 mg does not contain 10 mg of peptide. This is not a supplier shortcut — it follows from how peptides are purified and dried — but it is routinely missed…
Two analytical questions sit behind every research peptide: is this the right molecule, and how much of the vial is that molecule rather than something else?
A Certificate of Analysis (COA) is the document that separates a characterised research compound from an unknown powder. It is also the document most buyers skim without reading.
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