Correct me if I'm wrong, and if I am, I'll eat a bug, but this iron salt would be written: C
12H
22FeO
14, 2H
2O.
Iron supplement, used as a treatment for iron deficiencies, as it will stimulate the body's production of hemoglobin. It's added to breakfast cereals, soy products, beverages, to boost iron content, and cans of olives to make them a uniform shade of black.
The U.S. Consumer Product Safety Commission sez: keep out of reach of children. (An accidental overdose of iron can be fatal to young children).