How to Read a Certificate of Analysis (COA) for Peptides

A Certificate of Analysis (COA) is more than just a document—it’s proof of identity, purity, and batch traceability. This guide walks you through the most important sections of a peptide COA, including compound verification, purity results, test methodologies, and batch/lot numbers. You’ll learn what researchers should look for when reviewing COAs and how proper documentation supports transparency and confidence in every research-grade product.