Iron(III) Oxide

Fe₂O₃

IUPAC: Iron(III) oxide

CAS: 1309-37-1

Overview

Iron(III) oxide, commonly known as rust or hematite, is a reddish-brown solid. It is the most common iron ore and gives Mars its red color.

Composition

Element Symbol Atoms Atomic Mass
Oxygen O 3 15.9990
Iron Fe 2 55.8450

Elemental Composition

O
30.1%
Fe
Iron ×2
69.9%

Uses

  • Iron production
  • Pigment (red ochre)
  • Polishing compound

Fun Facts

  • Fe₂O₃ is responsible for the red color of Mars, earning it the nickname 'Red Planet'

Structure

SMILES

O=[Fe]O[Fe]=O

Properties

Type
oxide
State
solid
Molar Mass
159.69 g/mol
Density
5.2400 g/cm³
Melting Point
1565.0 °C
Solubility
Insoluble

Molecular Descriptors

Exact Mass
159.8546
TPSA
43.4 Ų
H-Bond Donors
0
H-Bond Acceptors
3
Rotatable Bonds
0
Heavy Atoms
5
Complexity
34.0

Frequently Asked Questions

What is Iron(III) Oxide?
Iron(III) Oxide (Fe₂O₃) is a oxide compound with the IUPAC name Iron(III) oxide.
What is the molecular weight of Iron(III) Oxide?
Iron(III) Oxide has a molar mass of 159.69 g/mol.
What state is Iron(III) Oxide at room temperature?
Iron(III) Oxide is a solid at room temperature.
Is Iron(III) Oxide organic or inorganic?
Iron(III) Oxide is classified as an inorganic compound.
What elements make up Iron(III) Oxide?
Iron(III) Oxide (Fe₂O₃) is composed of Oxygen (O), Iron (Fe).