CasNo： 1309-37-1
MF： Fe2O3
Appearance： red to reddish-brown powder
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Description |
Ferric oxide is the inorganic compound with the formula Fe2O3. It is one of the three main oxides of iron, the other two being iron(II) oxide (FeO) the rarer form, and iron(II,III) oxide (Fe3O4) which naturally as magnetite. |
| Pharmaceutical Uses | Ferric oxide red (Fe2O3), also known as iron (III) oxide, is a coloring agent for tablets and capsules and is used in the pharmaceutical industry. Ferric oxide red occurs naturally as hematite ore and rust. Iron oxides are also commonly used in the cosmetics industry. |
InChI:InChI=1/2Fe.3O/rFe2O3/c3-1-5-2-4
Values are reported for the d.c. conductivity and Seebeck voltage of several specimens of high-purity polycrystalline alpha ferric oxide between 20°C and 1350°C. It is found that carriers arising from deviations in stoichiometry contribute to conduction in fired specimens.
Inert marker experiments have shown that the solid-state reactions forming MgAl2O4 and MgFe2O4 occur by counterdiffusion of the Mg2+, Fe3+, and A13+ ions through the relatively rigid oxygen lattice of the spinel or ferrite. It is suggested that earlier claims that ZnAl2O4 forms by diffusion of Zn2+ and O2- ions were probably due to a splitting of the markers, leaving some marker on the specimen surface.
