IRON (II) OXIDE
- Iupac Name：oxoiron
- CAS No.: 1345-25-1
- Molecular Weight：71.844
- Modify Date.: 2022-11-02 12:51
- Introduction: In manufacture of green, heat-absorbing glass; in steel manufacture; in enamels; as catalyst.
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1. Names and Identifiers
- 1.1 Name
- IRON (II) OXIDE
- 1.2 Synonyms
CI 77489 EINECS 215-721-8 FERROUS OXIDE Iron monooxide Iron monoxide Iron, oxo- ironmonooxide[qr] ironmonoxide[qr] ironoxide(feo) ironoxide[feo][qr] MFCD00016095 Natural wuestite naturalwuestite[qr] Oxoiron
- 1.3 CAS No.
- 1345-25-1
- 1.4 CID
- 14945
- 1.5 EINECS(EC#)
- 215-721-8
- 1.6 Molecular Formula
- FeO (isomer)
- 1.7 Inchi
- InChI=1S/Fe.O
- 1.8 InChkey
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N
- 1.9 Canonical Smiles
- O=[Fe]
- 1.10 Isomers Smiles
- O=[Fe]
2. Properties
- 2.1 Density
- 5.7?g/mL?at 25?°C(lit.)
- 2.1 Melting point
- 1369°C
- 2.1 Precise Quality
- 71.92990
- 2.1 PSA
- 17.07000
- 2.1 logP
- -0.12130
- 2.1 Appearance
- solid
- 2.2 Storage
- Air Sensitive. Ambient temperatures.
- 2.3 Color/Form
- Black cubic crystals
- 2.4 Water Solubility
- Practically insol in water and alkalies; readily sol in acids
Insoluble in alcohol
- 2.5 Spectral Properties
- INDEX OF REFRACTION: 2.23
- 2.6 Stability
- Stable. Incompatible with strong oxidizing agents. Highly flammable.
3. Use and Manufacturing
- 3.1 Usage
- In manufacture of green, heat-absorbing glass; in steel manufacture; in enamels; as catalyst.
4. Safety and Handling
- 4.1 Hazard Codes
- F
- 4.1 Risk Statements
- R11
- 4.1 Safety Statements
- 16-33-7/9
- 4.1 Other Preventative Measures
- SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
All ... /iron/ preparations should be kept in child-proof bottles. /Iron preparations/
- 4.2 Cleanup Methods
- Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.
- 4.3 DisposalMethods
- SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.
- 4.4 RIDADR
- UN 3178 4.1/PG 2
- 4.4 Fire Fighting Procedures
- In case of fire in the surroundings: all extinguishing agents allowed.
- 4.5 FirePotential
- Ferrous oxide is spontaneously flammable in air.
The oxide (prepared at 300 deg C) burns in air above 200 deg C, while the finely divided oxide prepared by reduction may be pyrophoric at ambient temperature. That prepared by thermal decomposition under vacuum of iron(II)oxalate is also pyrophoric.
- 4.6 WGK Germany
- -
- 4.6 Protective Equipment and Clothing
- If inhaled, iron is a local irritant to the lung and gastrointestinal tract. /Iron compounds/
- 4.7 Reactivities and Incompatibilities
- Fluorine does not act in the cold on ferrous oxide, but with gentle heat a reaction sets in with incandescence.
When ferrous oxide, prepared at 300 deg C, is heated in sulfur dioxide, the mass becomes incandescent.
Easily oxidized by air. It is a strong base and readily absorbed /carbon dioxide/.
The oxide incandesces when heated in sulfur dioxide.
Ignites when heated in air above 200 deg C
Hazardous reaction with nitric acid (powdered oxide); hydrogen peroxide; sulfur dioxide and heat.
When pyrophoric iron oxide is gently warmed with nitric acid, the oxide becomes incandescent.
- 4.8 Report
-
Related compounds: Iron(III) oxide, Iron(II,III) oxide
- 4.9 Skin, Eye, and Respiratory Irritations
- If inhaled, iron is a local irritant to the lung and gastrointestinal tract. /Iron compounds/
- 4.10 Safety
-
Ignites when heated in air above 200°C. The powdered oxide may be pyrophoric. Incandescent or hazardous reaction with nitric acid (with powdered oxide), hydrogen peroxide, sulfur dioxide + heat. See also IRON and IRON COMPOUNDS.
Safety Information of?Iron(II) oxide (CAS NO.1345-25-1):
Hazard Codes: F
Risk Statements: 11???
R11:Highly flammable.
Safety Statements: 16-33-7/9?
S16:Keep away from sources of ignition.?
S33:Take precautionary measures against static discharges.?
S7:Keep container tightly closed.?
S9:Keep container in a well-ventilated place.
RIDADR: UN 3178 4.1/PG 2
- 4.11 Sensitive
- Air Sensitive
- 4.12 Specification
-
?Iron(II) oxide , its CAS NO. is 1345-25-1, the synonyms are Iron monooxide ; Natural wuestite ; Iron(II) oxide .
5. MSDS
2.Hazard identification
2.1 Classification of the substance or mixture
Not classified.
2.2 GHS label elements, including precautionary statements
| Pictogram(s) | No symbol. |
| Signal word | No signal word. |
| Hazard statement(s) | none |
| Precautionary statement(s) | |
| Prevention | none |
| Response | none |
| Storage | none |
| Disposal | none |
2.3 Other hazards which do not result in classification
none
6. Synthesis Route
1345-25-1Total: 42 Synthesis Route
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Literatures:
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, , vol. 93, p. 1141 - 1141
Bulletin de la Societe Chimique de France, , vol. 38, p. 110 - 110
Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, , vol. 93, p. 1024 - 1024
Fe: MVol.B1, 11, page 28 - 30
Bulletin de la Societe Chimique de France, , vol. 38, p. 157 - 157
Yield: null
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8. Other Information
- 8.0 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.
- 8.1 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 four02- ions per unit cell.
- 8.2 Physical properties
- Black cubic crystal; density 5.7g/cm3; melts at 1,377°C; insoluble in water and alkalies; dissolves in acids.
- 8.3 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.
- 8.4 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).
- 8.5 Merck
- 14,4052
- 8.6 Chemical Properties
- solid
- 8.7 Uses
- In manufacture of green, heat-absorbing glass; in steel manufacture; in enamels; as catalyst.
- 8.8 Usage
- 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.
9. Computational chemical data
- Molecular Weight: 71.844g/mol
- Molecular Formula: FeO
- Compound Is Canonicalized: True
- XLogP3-AA: null
- Exact Mass: 71.929850
- Monoisotopic Mass: 71.929850
- Complexity: 2
- Rotatable Bond Count: 0
- Hydrogen Bond Donor Count: 0
- Hydrogen Bond Acceptor Count: 1
- Topological Polar Surface Area: 17.1
- Heavy Atom Count: 2
- Defined Atom Stereocenter Count: 0
- Undefined Atom Stereocenter Count: 0
- Defined Bond Stereocenter Count: 0
- Undefined Bond Stereocenter Count: 0
- Isotope Atom Count: 0
- Covalently-Bonded Unit Count: 1
- CACTVS Substructure Key Fingerprint: AAADcQAAIAAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
10. Question & Answer
-
The Wikipedia page for ferrous oxide states that F e O F e O can be prepared by the thermal decomposition of iron(II) oxalate, with the following reaction: F e C X 2 O X 4 ? F e O + C O X 2 + C O F e C X 2 O X 4 ? F e O + C O X 2 + C O And that the procedure is conducted under an inert atmosphere t...
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