DESCRIPTION

Synthetic Iron Oxide consists of any one or any combination of synthetically prepared iron oxides, including the hydrated forms. It is produced from ferrous sulfate by heat soaking, removal of water, decomposition, washing, filtration, drying, and grinding. It is produced in either anhydrous or hydrated forms. The range of hues for Synthetic Iron Oxide includes yellows, reds, browns and blacks. The food-quality iron oxides are primarily distinguished from technical grades by their comparatively low levels of contamination by other metals, which is achieved by the selection and control of the source of the iron or by the extent of chemical purification during the manufacturing process. Synthetic Iron Oxide is insoluble in water and organic solvents and soluble in concentrated mineral acids.