IRON (II) OXIDE #CAS1345-25-1
When iron is heated in a low partial pressure of oxygen above 575°C, FeO is formed. However, this is only stable at high temperatures and decomposes into iron and Fe304 when it is cooled slowly. To obtain crystalline FeO the high temperature product must be quenched rapidly to stop this disproportionation.
Crystalline FeO (wustite) melts at 1368°C with a heat of fusion ΔH= 7·5 kcal mole-1. It has a heat of formation of - 63·7 kcal mole-1 at 25° and a density of 5·7. Below 198°K (the Néel temperature) FeO is antiferromagnetic. It crystallizes with the rock salt structure having four Fe2+ and four02- ions per unit cell.
Iron(II) oxide occurs in the mineral, wustite. It is used in the manufacture of heat-absorbing green glasses. It also is used in ceramic mixtures and enamels; and as a catalyst.
Application of IRON (II) OXIDE
In manufacture of green, heat-absorbing glass; in steel manufacture; in enamels; as catalyst.
In manufacture of green, heat-absorbing glass; in steel manufacture; and as a catalystIron(II) oxide is used in manufacturing of green, heat-absorbing glass; in steel manufacture; and as a catalyst. It is used as a dye or pigment in pottery, glazes and glasses. It finds application as heat-absorbing glass used in buildings and automobiles. It is used as a precursor in the production of steel. It is also used in cosmetics and some tattoo inks. It can also be used for filtering phosphates from home aquaria and acts as a catalyst in a number of industrial and chemical operations.
| IRON (II) OXIDE Chemical Properties |
| Melting point | 1369°C |
| density | 5.7 g/mL at 25 °C(lit.) |
| solubility | insoluble in H2O, alkaline solutions; soluble in acid solutions |
| form | 5 Mesh |
| color | black cubic crystals, crystalline |
| Water Solubility | Insoluble in water and alkalies. Soluble in HCl, H{2}SO{4}. Slightly soluble in HNO{3}Insoluble in water, alcohol and alkali. Soluble in hydrochloric acid and sulfuric acid. Slightly soluble in nitric acid. |
| Crystal Structure | NaCl type |
| Sensitive | Air Sensitive |
| Merck | 14,4052 |
| crystal system | Cube |
| Space group | Fm3m |
| Lattice constant | a/nmb/nmc/nmα/oβ/oγ/oV/nm30.43260.43260.43269090900.081 |
| Dielectric constant | 14.2（16.0℃） |
| Stability: | Stable. Incompatible with strong oxidizing agents. Highly flammable. |
| Major Application | battery manufacturing |
| Cosmetics Ingredients Functions | COLORANT |
| InChI | 1S/Fe.O |
| InChIKey | UQSXHKLRYXJYBZ-UHFFFAOYSA-N |
| SMILES | O=[Fe] |
| CAS DataBase Reference | 1345-25-1(CAS DataBase Reference) |
| EPA Substance Registry System | Ferrous oxide (1345-25-1) |
| Safety Information |
| Hazard Codes | F |
| Risk Statements | 11 |
| Safety Statements | 16-33-7/9 |
| OEB | B |
| OEL | TWA: 5.0 mg/m3 |
| RIDADR | UN 3178 4.1/PG 2 |
| WGK Germany | - |
| TSCA | TSCA listed |
| Storage Class | 13 - Non Combustible Solids |
| Hazardous Substances Data | 1345-25-1(Hazardous Substances Data) |
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