COA (Certificate of Analysis)

COA (Certificate of Analysis) is an authoritative quality document issued by the manufacturer or a third-party testing institution in foreign trade, used to certify that the chemical composition, physical properties, microbiological indicators, etc. of goods (such as chemicals, food, pharmaceuticals, metal materials, etc.) comply with contract or standard requirements. Usage scenarios include: attaching COA at delivery for buyer acceptance, letter of credit negotiation, customs clearance, and quality dispute resolution. Precautions: COA must be issued by a qualified laboratory, its content must strictly match the contract specifications, and it usually needs to show batch number, test methods, results, and conclusions; if the buyer requires a specific format or third-party institution (such as SGS, BV), it must be confirmed in advance. The difference from COC (Certificate of Conformity) is that COA focuses on specific test data, while COC focuses on product compliance with regulations or standards; unlike MSDS (Material Safety Data Sheet), COA addresses quality rather than safety. In foreign trade, ensure COA is authentic and traceable to avoid claims or legal risks caused by forgery.