Quality Control
Certificate of Analysis
Definition
A Certificate of Analysis (COA) is a document issued by a quality control laboratory that confirms a product meets its specified quality standards. For research peptides, a COA typically includes HPLC purity data (chromatogram and percentage), mass spectrometry results confirming molecular identity, appearance description, lot/batch number, and storage recommendations. A reputable peptide supplier provides batch-specific COAs for every product, enabling researchers to verify the quality and identity of their materials.