I

Iron(II) oxide

IUPAC: iron(2+);oxygen(2-)

FeO Inorganic Compounds CAS 1345-25-1
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Quick Reference
Formula / NotationFeO
CAS Number1345-25-1
Molecular Weight71.84
Melting Point1377 °C
Density6.0 g/cu cm
SolubilityPractically insol in water and alkalies; readily sol in acids
AppearanceDry Powder; Other Solid; Dry Powder, Pellets or Large Crystals
Also Known Asiron(2+);oxygen(2-); Iron oxide (FeO); DTXSID1041976; G7036X8B5H; CI 77489; C.I. 77489; IRON (II) OXIDE; RefChem:921574; DTXCID201323594; 215-721-8
CategoryInorganic Compounds

What is Iron(II) oxide?

Iron(II) oxide (FeO) is an inorganic compound that appears as Dry Powder; Other Solid; Dry Powder, Pellets or Large Crystals. It has a molecular weight of 71.84 g/mol. Its IUPAC name is iron(2+);oxygen(2-). Melting point: 1377 °C.

Formula & Notation

FeO

IUPAC Name: iron(2+);oxygen(2-)

Other Names / Synonyms: iron(2+);oxygen(2-); Iron oxide (FeO); DTXSID1041976; G7036X8B5H; CI 77489; C.I. 77489; IRON (II) OXIDE; RefChem:921574; DTXCID201323594; 215-721-8

Properties & Characteristics

Appearance: Dry Powder; Other Solid; Dry Powder, Pellets or Large Crystals. Molecular formula: FeO. Molecular weight: 71.84 g/mol. Melting point: 1377 °C. Density: 6.0 g/cu cm. Solubility: Practically insol in water and alkalies; readily sol in acids.

Physical Data

PropertyValue
Melting Point1377 °C
Density6.0 g/cu cm
Molecular Weight71.84
SolubilityPractically insol in water and alkalies; readily sol in acids
AppearanceDry Powder; Other Solid; Dry Powder, Pellets or Large Crystals

Uses & Applications

Used in industrial processes, materials science, semiconductor manufacture, ceramics, or as a catalyst.

Safety Information

May be corrosive, toxic, or an oxidising agent. Handle in well-ventilated area. Consult SDS before use.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Iron(II) oxide
Formula FeO
CAS Number 1345-25-1
Molecular Weight 71.84
Synonyms iron(2+);oxygen(2-); Iron oxide (FeO); DTXSID1041976; G7036X8B5H; CI 77489; C.I. 77489; IRON (II) OXIDE; RefChem:921574; DTXCID201323594; 215-721-8

Frequently Asked Questions

Iron(II) oxide (FeO) is an inorganic compound that appears as Dry Powder; Other Solid; Dry Powder, Pellets or Large Crystals. It has a molecular weight of 71.84 g/mol. Its IUPAC name is iron(2+);oxygen(2-). Melting point: 1377 °C.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.