Testing & quality
Certificate of analysis
Also known as: coa · coas · cert of analysis
A laboratory report describing the identity, purity, and composition of one specific batch of material.
In plain terms
A useful COA names the peptide, the lot number, the testing laboratory and its methods, the HPLC purity together with its chromatogram, mass-spectrometry identity data, net peptide content and salt form, and the date of analysis.
A COA lacking a lot number, a named laboratory, or a chromatogram cannot be independently checked by anyone. That is not a minor omission; it is the entire purpose of the document.
Why it matters
A COA that does not match the lot number on your vial describes a batch you did not buy.
Guides that use this term
Sources
Educational reference only. Pepperz does not provide medical advice, diagnosis, treatment, prescribing guidance, or dosing recommendations.