What to request with a quotation: COA, MSDS, TDS and test reports explained

A certificate of analysis reports the measured values for a specific batch. A safety data sheet covers handling, storage and transport. A technical data sheet describes the intended properties and use of the grade. Test reports from a third party support a particular claim or standard. They are not interchangeable, and a supplier quoting one does not imply the others. Ask for all that apply to the ordered grade, check the product name and grade on each document matches the quotation, and verify the issuing body and date before a bulk order.