Ferrum reductum

A number of other forms of iron were used, but none gave as good results as the ferrum reductum. ... 

The use of iron preparations of the highest obtainable purity (both commercial and laboratory preparations) as starting materials. Principally employed were Ferrum reductum, Kahlbaum, and later, as an ultra pure material Iron Kahlbaum (cost of 1 kg. about 80.00). 

The acid enviromnent of the stomach provides a mechanism for solubifizing finely divided metalhc iron as well as metal hydroxides prior to their entry into the small intestine. There, neutrahzation in the presence of suitable ligands makes the iron bioavailable. The oldest form of iron fortification employed iron filings added to sweet wine. Today, colloidal metallic iron, ferrum reductum, is still a widely used fortificant in food. 

Koch et al. (1985) produced feroxyhyte in the same way as described above, except that the 0.1 M FeCb solution was produced by dissolving Ferrum reductum (a mixture of iron metal and Fe304) in HCl. They obtained platy crystals 15-90 nm across and 2-3 nm thick with a surface area of 110 m /g and a magnetic hyperfine field at 5 K of 52.5 T. The magnetic properties of this material are described in Bender-Koch et al. (1995). 

Reduced iron—Ferrum reductum (U. S.)—Fer. redactum (Br.)— is Fe, more or less mixed with FeaOs and FesO, obtained by heating FeaOa in H. 

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