Are there certificates of analysis for the Chemkey® Reagents?
Chemkey® Reagent COA
Unlike other Hach reagents, Chemkey® Reagent certificates of analysis (COAs) are not lot specific. They can be found by searching for the product number of the Chemkey® Reagents on www.hach.com and clicking the "Downloads" tab on the product page. The certificate is listed as a Quality Certificate in the "Other" section.