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Ferrous oxide

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Name

Ferrous oxide

EINECS 215-721-8
CAS No. 1345-25-1 Density 5.7 g/mL at 25 °C(lit.)
PSA 17.07000 LogP -0.12130
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. Melting Point 1369 °C
Formula FeO Boiling Point N/A
Molecular Weight 71.8464 Flash Point N/A
Transport Information N/A Appearance solid
Safety 16-33-7/9 Risk Codes 11
Molecular Structure Molecular Structure of 1345-25-1 (IRON (II) OXIDE) Hazard Symbols FlammableF
Synonyms

C.I. 77489;Iron monooxide;Iron monoxide;Iron oxide (FeO);Iron(II) oxide;Natural wuestite;

Article Data 463

Ferrous oxide Synthetic route

iron(III) oxide

1345-25-1

iron(II) oxide

Conditions
ConditionsYield
With water; hydrogen In neat (no solvent) byproducts: Fe; formation of FeO at 800°C;;92%
With water; hydrogen In neat (no solvent) byproducts: Fe; formation of FeO at 700°C;;85%
With hydrogen In neat (no solvent) redn. of Fe2O3 in a stream of H2 below red heat;;

1-trimethylsilyl-μ3-S,S'-ethylenedithiolatohexacarbonyldiiron

A

1345-25-1

iron(II) oxide

B

iron sulfide

C

(CH3)3SiC2H3S10Fe3

Conditions
ConditionsYield
In decane byproducts: Me3SiCHCH2, CH2CH2, CH3CHCH2; O2 atmosphere; decompn. (170°C, 8 h); further byproducts: (Me3Si)2O, (Me2SiO)3 and (Me2SiO)4; GLC, chromato-mass spectroscopy;A 20%
B 70%
C 10%

iron(II,III) oxide

1345-25-1

iron(II) oxide

Conditions
ConditionsYield
In neat (no solvent) formation of FeO during 24 h at 600°C;;51%
In neat (no solvent) formation of FeO during 24 h at 592°C;;24%
In neat (no solvent) preparation of FeO in the high-frequenzy induction furnace;;

iron sulfide

calcium oxide

A

1345-25-1

iron(II) oxide

B

iron calcium oxysulfide

Conditions
ConditionsYield
In neat (no solvent) pressed into pellets, fired at 1190 K for 4 h in flowing He; obtained as a mixt.;A 1%
B n/a
13463-40-6

iron pentacarbonyl

1333-74-0

hydrogen

A

iron(II,III) oxide

B

1345-25-1

iron(II) oxide

C

iron(III) oxide

D

cementite

Conditions
ConditionsYield
In neat (no solvent, gas phase) mixt. of vapor of Fe(CO)5 and H2 decomposed by plasma-chemical decomposition on Al2O3; monitored by XRD;A n/a
B n/a
C n/a
D 1%
E n/a

iron oxide

iron(II) titanate

A

1345-25-1

iron(II) oxide

B

Fe2.40Ti0.60O4

Conditions
ConditionsYield
In neat (no solvent, solid phase) ball milled Fe2TiO4 was mixed with stoich. amts. of Fe3O4; ball milled for 10 min; placed in steel crucible; heated at 950°C for 60 h under Ar; cooled in furnace under Ar atm. to 400°C; air cooled to room temp.; identified by X-ray diffraction;A 1%
B n/a
13463-40-6

iron pentacarbonyl

A

1345-25-1

iron(II) oxide

B

iron(III) oxide

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 160℃; for 2h; Heating / reflux;
765207-04-3

iron(III) phosphate

A

1345-25-1

iron(II) oxide

B

phosphorus pentoxide

Conditions
ConditionsYield
In neat (no solvent) the equilibrium constant was determined;;

iron(II) metasilicate

1345-25-1

iron(II) oxide

Conditions
ConditionsYield
With methyllithium In neat (no solvent) byproducts: SiO2; heating iron(II)-silicate for 1 h at 1200°C in presence of excess of lime; dissociation in FeO and SiO2;;>99

iron(III) oxide

A

iron(II,III) oxide

B

1345-25-1

iron(II) oxide

Conditions
ConditionsYield
With carbon In neat (no solvent, solid phase) byproducts: CO, CO2; under Ar, mixt. of Fe2O3 and C heated at 800°C for 1 h; identified by X-ray analysis;

Ferrous oxide Chemical Properties

Product Name: Iron(II) oxide (CAS NO.1345-25-1)

Molecular Formula: FeO
Molecular Weight: 71.84g/mol
Mol File: 1345-25-1.mol
EINECS: 215-721-8
Melting Point: 1369°C
Sensitive: Air Sensitive
Stability: Stable. Incompatible with strong oxidizing agents. Highly flammable.
H-Bond Donor: 0
H-Bond Acceptor: 1
Structure Descriptors of Iron(II) oxide (CAS NO.1345-25-1):
  IUPAC Name: oxoiron
  Canonical SMILES: O=[Fe]
  InChI: InChI=1S/Fe.O 
  InChIKey: UQSXHKLRYXJYBZ-UHFFFAOYSA-N
Product Categories: Inorganic Chemicals; Inorganics; Metal and Ceramic Science; Oxides

Ferrous oxide Uses

 Iron(II) oxide (CAS NO.1345-25-1) is used as a pigment. It is FDA-approved for use in cosmetics and it is used in some tattoo inks.

Ferrous oxide Production

   Iron(II) oxide can be prepared by heating Ferrous oxide in vacuo: 
                     FeC2O4 → FeO + CO + CO2
The black powder can be made less reactive by heating. The heated sample has a more physical change is quenched to prevent disproportionation.Stoichiometric FeO can be prepared by heating Fe0.95O with metallic iron at 770 °C and 36 kbar.

Ferrous oxide Consensus Reports

Related compounds: Iron(III) oxide, Iron(II,III) oxide

Ferrous oxide Safety Profile

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: FFlammable
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

Ferrous oxide Standards and Recommendations

DFG MAK: 1.5 mg/m3 calculated as fine dust.

Ferrous oxide Specification

 Iron(II) oxide , its CAS NO. is 1345-25-1, the synonyms are Iron monooxide ; Natural wuestite ; Iron(II) oxide .

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