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.

Sensitive 

Air Sensitive

Crystal Structure

NaCl type

crystal system

Cube

Merck 

14,4052

Space group

Fm3m

Lattice constant

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.4326	0.4326	0.4326	90	90	90	0.081

Dielectric constant

14.2（16.0℃）

Stability:

Stable. Incompatible with strong oxidizing agents. Highly flammable.

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

RIDADR 

UN 3178 4.1/PG 2

OEB

B

OEL

TWA: 5.0 mg/m3

WGK Germany 

-

TSCA 

Yes

Hazardous Substances Data

1345-25-1(Hazardous Substances Data)

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

IRON (II) OXIDE Usage And Synthesis

Description

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.

Chemical Properties

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 four0^2- ions per unit cell.

Chemical Properties

solid

Physical properties

Black cubic crystal; density 5.7g/cm³; melts at 1,377°C; insoluble in water and alkalies; dissolves in acids.

Occurrence

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.

Uses

In manufacture of green, heat-absorbing glass; in steel manufacture; in enamels; as catalyst.

Uses

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.

Definition

ChEBI: Ferrous oxide is an iron oxide.

Preparation

Iron(II) oxide may be prepared by thermal decomposition of iron(II) oxalate:
FeC₂O₄ → FeO + CO + CO₂
The product obtained above is impure, that may contain small quantities of triiron tetroxide, Fe3O4 and carbon.
The oxide is stable above 575°C. Thus, it can be prepared by heating iron with oxygen under appropriate pressure at 575°C. Also, iron(II) oxide has been prepared by saturating the fused triiron tetroxide with iron, powdering the mixture, followed by magnetic separation of the oxide from excess iron (Sidgwick, N.V. 1950. The Chemical Elements and Their Compounds, Vol.2, pp 1328, Oxford: Clarendon Press).

IRON (II) OXIDE(1345-25-1)Related Product Information

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