Ferrous oxide

HCID 449809CAS 1345-25-1

Basic information

Standard SMILES
[Fe+2].[O-2]
InChIKey
VBMVTYDPPZVILR-UHFFFAOYSA-N
Molecular formula
FeO
Average molar mass
71.84 g/mol
Monoisotopic mass
71.92985

Names & identifiers

Preferred name
Ferrous oxide
IUPAC
iron(2+);oxygen(2-)

Names & synonyms

Iron oxide (FeO)DTXSID1041976G7036X8B5HCI 77489C.I. 77489IRON (II) OXIDERefChem:921574DTXCID201323594215-721-81345-25-1CHEBI:50820Ferrous oxide
Show more names
Iron monooxideIron monoxideIron(II) oxideNatural wuestiteMOLI000197FERROUS OXIDE [II]FERROUS OXIDE [MI]SCHEMBL66546

Database identifiers

CAS
1345-25-1
PubChem CID
449809
DTXSID
DTXSID1041976
UNII
G7036X8B5H

Properties

Computed structural properties

Topological polar surface area
1 Ų
Hydrogen bond donors
0
Hydrogen bond acceptors
1
Rotatable bonds
0
Heavy atoms
2

Experimental & physicochemical properties

Density · 3 items

6.0 g/cu cm

5.7 g/cm³

6 @25 °C

Color/FormBlack cubic crystals
Solubility · 3 items

Practically insol in water and alkalies; readily sol in acids

Insoluble in alcohol

Solubility in water: none

Melting Point · 3 items

1377 °C

1360 °C

1377 °C

Refractive IndexINDEX OF REFRACTION: 2.23
Physical Description · 3 items

Large Crystals; Other Solid

Black solid; [ICSC] Black odorless powder; Insoluble in water; [MSDSonline]

BLACK SOLID IN VARIOUS FORMS.

Safety & regulation

Hazard information

Regulatory Information · 3 items

Chemical: Iron oxide (FeO)

Iron oxide (FeO) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Iron oxide (FeO) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Iron oxide (FeO): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

Other Safety InformationIMAP assessments - Iron oxide (FeO): Environment tier I assessment;IMAP assessments - Iron oxide (FeO): Human health tier I assessment
Fire HazardsCombustible under specific conditions.
Fire Potential · 2 items

Ferrous oxide is spontaneously flammable in air.

The oxide (prepared at 300 °C) burns in air above 200 °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.

Hazards SummaryChronic inhalation of dust can result in siderosis; [ICSC] An irritant; [MSDSonline] See Iron oxide (Fe2O3).
Special ReportsJoint FAO/WHO Expert Committee on Food Additives; WHO Food Additives Ser 6: Iron oxides and hydrated iron oxides (1975). Available from: http://www.inchem.org/documents/jecfa/jecmono/v06je23.htm as of September 14, 2004.

Safety & protection

Fire FightingIn case of fire in the surroundings, use appropriate extinguishing media.
First Aid Measures · 4 items

Fresh air, rest.

Rinse and then wash skin with water and soap.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth.

Fire Fighting ProceduresIn case of fire in the surroundings: all extinguishing agents allowed.
Cleanup MethodsSweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.
Disposal Methods · 1 item

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.

Spillage Disposal · 1 item

Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water.

Toxicology

Ecotoxicity ValuesLC50 Gambusia affinis (Western mosquitofish) >10,000 mg/L/24, 48, 96 hr; static
Signs and SymptomsCough.
Natural Pollution SourcesHematite, goethite, and lepidocrocite /are minerals that/ contain ferrous oxide
Human Toxicity Excerpts · 3 items

/HUMAN EXPOSURE STUDIES/ Collection of iron dust in lungs ... has been termed siderosis... Siderosis is considered benign condition and does not progress to fibrosis. /Iron oxide fume/

/CASE REPORTS/ ...Two women underwent dermopigmentation on the face in a beauty institution to create pseudo-freckles. Definite macular hyperpigmentation occurred with dyschromia in both subjects.

/CASE REPORTS/ ...Histopathologic studies /were performed/ on a series of three eyelid specimens, including two by a previously undescribed multi-needle pigment delivery system. Light microscopy revealed the epidermis to be pigment-free and the dermis to contain pigment in clumps. Transmission electron microscopy (EM) demonstrated that the pigment was largely in macrophages. Energy-dispersive x-ray micro-analysis showed that in addition to iron and talc, titanium particles were also present. These findings suggest that the pigment is tolerated by the eyelid despite the fact that current pigments are contaminated.

Non-Human Toxicity Excerpts · 3 items

/LABORATORY ANIMALS: Subchronic or Prechronic Exposure/ Dogs were injected with iron oxide iv each week for 6-10 weeks, until a total of 0.5 or 1.0 g/kg of iron was administered to each of two dogs. The four dogs were then followed for seven years. Hepatic function tests and biopsies of liver, spleen, pancreas and other organs were performed. Hemochromatosis was not induced, but blindness, with lesions similar to retinitis pigmentosa, developed in all dogs. No control group was included in this study. /Iron oxide, nos/

/LABORATORY ANIMALS: Chronic Exposure or Carcinogenicity/ Ten males and three female /minks/ were fed iron oxide as 0.75% of their diet. Reproduction, whelping, and lactation were seen to be similar to that of controls. Six male and four female pups were then continued on the iron oxide diet until pelting (165 days). Although fur quality and growth were normal, these mink had acute nephrosis and hepatosis at pelting. /Iron oxide, nos/

/LABORATORY ANIMALS: Chronic Exposure or Carcinogenicity/ Ten dogs were fed from 1-9 years on diets containing iron oxide colorant at 570 mg/lb. Daily consumption was estimated at 428 mg/dog. Two Labradors fed one year had loose droppings, otherwise there were no adverse effects observed. /Iron oxide, nos/

Evidence for CarcinogenicityA4: Not classifiable as a human carcinogen. /Iron oxide (Fe2O3)/

Regulatory information

Regulatory Information · 3 items

Chemical: Iron oxide (FeO)

Iron oxide (FeO) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Iron oxide (FeO) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Iron oxide (FeO): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

Federal Drinking Water GuidelinesEPA 300 ug/L /Iron/

Chemistry & industry

Uses & manufacturing

Uses · 5 items

Used as a catalyst and to make steel, enamels, and heat-absorbing glass; [Merck Index]

Steel Producing [Category: Industry];Glass Manufacturing [Category: Industry]

Enameling [Category: Hobbies]

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

Iron oxide pigments are widely used to provide color, hiding power, and/or reinforcement in paints, coatings, construction materials, plastics, paper, glass, ceramics, and rubber goods. In addition iron oxides are used as catalysts in chemical processing and as the source of micronutrient iron in animal feeds and fertilizers. Specialized iron oxides of high purity and controlled uniformity are ued in the manufacture of ferrites (ceramic magnets) which have application in computer memory cores, hi-fi speakers, color TV, and other electrical and electronic products. Magnetic iron oxide pigments are used in audio and video tapes and cassettes and in magnetic printing inks. Magnetic and electronic applications for iron oxide pigments are the fastest growing uses.

ImpuritiesProduct contains ferric oxide
U.S. Exports(1984) 3.90X10+9 g /Iron Oxides & Hydroxides/
U.S. Imports(1984) 1.85X10+10 g /Iron Oxides & Hydroxides, synthetic: NSPF, yellow, Red 7 Black
U.S. Production · 2 items

2023: 55,000,000 - <70,000,000 lb;2022: 55,000,000 - <70,000,000 lb;2021: 55,000,000 - <70,000,000 lb;2020: 55,000,000 - <70,000,000 lb

(1981) 1.28X10+11 g /Natural & Synthetic Iron Oxides Sold/

Consumption PatternsPaints & coatings, 37%; Building materials, 22%; Plastics, inks, rubber, glass coloring, 11%; Ferrites & magnetic uses, 9%; Industrial chemicals, 7%; Animal feeds and fertilizers, 7%; and Misc, 7% (1981) /Iron Oxides/

Related reactions

19 records

Linked notes

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