Product Description of Direct Triiron Tetraoxide (CAS #1317-61-9)
Triiron tetroxide can be obtained from its natural mineral source, magnetite. In laboratory settings, it can be synthesized by adding a sodium hydroxide solution to an aqueous 1:2 molar mixture of ferrous and ferric salts (1 mol FeCl₂ + 2 mol FeCl₃). The resulting black hydroxide precipitate dehydrates upon heating to form triiron tetroxide:
Fe²⁺(aq) + 2Fe³⁺(aq) + 8OH⁻(aq) → Fe₃(OH)₈(s)
Fe₃(OH)₈(s) → Fe₃O₄(s) + 4H₂O(g)
Triiron tetroxide can also be produced through partial oxidation of iron or iron(II) sulfate by heating under limited air supply. Another method involves reacting iron metal with steam at elevated temperatures.
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Triiron tetraoxide Chemical Properties
Melting point | 1538 °C(lit.) |
density | 4.8-5.1 g/mL at 25 °C(lit.) |
refractive index | 3 |
Fp | 7 °C |
storage temp. | -20°C |
solubility | Aqueous Acid (Slightly) |
form | powder |
color | black |
Specific Gravity | 5.2 |
Odor | at 100.00?%. odorless |
Water Solubility | Insoluble in water and organic solvents. Soluble in concentrated mineral acids. |
Crystal Structure | Inverse spinel type |
crystal system | Cube |
Merck | 144040 |
Space group | Fd3m |
Lattice constant | a/nmb/nmc/nmα/oβ/oγ/oV/nm30.839410.839410.839419090900.5915 |
Stability: | Stable. Incompatible with strong acids, chloroformates, peroxides. |
CAS DataBase Reference | 1317-61-9(CAS DataBase Reference) |
NIST Chemistry Reference | Iron(ii,iii) oxide(1317-61-9) |
EPA Substance Registry System | Iron oxide (Fe3O4) (1317-61-9) |
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Product Applications of Direct Triiron Tetraoxide (CAS #1317-61-9)
Triiron tetroxide is primarily used as a black pigment and as a catalyst in the Haber process and the water-gas shift reaction. It also serves as a contrast agent in MRI imaging. Additionally, it finds applications as a pigment in magnetic materials, polishing compounds, cosmetics, pharmaceuticals, polymers, rubber, fillers, building and construction materials, household appliances, and magnetic inks.
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