Scientific Glossary

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A COA is an analytical document from a qualified laboratory that confirms a compound's identity, purity (typically by HPLC), potency, and absence of contaminants. For research peptides, key COA parameters include: peptide content (%), HPLC purity (%), residual solvents, heavy metals, and endotoxin levels. Legitimate research supply companies provide COAs from independent third-party laboratories, not just manufacturer self-testing. When evaluating research compound sourcing, COA transparency is the primary quality indicator.