For more than 30 years, QC Corporation and its affiliate company Add-Iron Corporation, has been North America's leading processor of dried Ferrous Sulfate. QC Corporation began Ferrous Sulfate drying operations in Baltimore, MD in 1971. In 1981, QC Corporation moved to Cape Girardeau, Missouri to meet anticipated growth and reduce transportation costs. Our 140,000 sq. ft. production and warehouse facility has undergone 5 expansions since its startup. Add-Iron Corporation's 96,000-sq. ft. production facility was built in 1996 in North Lima, Ohio, to satisfy expanding markets and our customers in the eastern regions of Canada and the United States. Rail or truck can make shipments from both locations.

Processing equipment for the production of Diamond Brand?Custom Formulated Micronutrients was added at Cape Girardeau, Missouri in 2000. QC produces on a tolling or contract manufacturing basis customized granulated micronutrient combinations and other products to meet specific customer specifications.