Ferric oxide CAS 1309-37-1

Introduction：Basic information about Ferric oxide CAS 1309-37-1, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

Ferric oxide Basic information

• Product Name: Ferric oxide
• Synonyms: Ferric oxide(II,III), magnetic nanoparticles solution;Ferric(III) oxide;Iron(III) oxide, 99% trace metals basis;Iron(III) oxide, 99.9% trace metals basis;Iron(III) oxide, 98% trace metals basis;Iron(III) oxide, 99.95% trace metals basis;Iron(III) oxide, 99.99% trace metals basis;Iron(lll) oxide
• CAS: 1309-37-1
• MF: Fe2O3
• MW: 159.69
• EINECS: 215-168-2
• Product Categories: Inorganics;metal oxide
• Mol File: 1309-37-1.mol

Ferric oxide Chemical Properties

Melting point	1538°C
density	5.24
Fp	>230 °F
storage temp.	2-8°C
solubility	It is soluble In Warm Hydrochloric Acid, Slightly Soluble in Sulfuric Acid.
form	pieces
Specific Gravity	5.1～5.2
color	black
PH	3.7±0.3
Water Solubility	INSOLUBLE
Crystal Structure	Corundum type
crystal system	Three sides
Merck	14,4028
Space group	R3c
Lattice constant	a/nm b/nm c/nm α/o β/o γ/o V/nm3 0.50259 0.50259 1.3735 90 90 120 0.3005
Exposure limits	ACGIH: TWA 5 mg/m3 OSHA: TWA 10 mg/m3; TWA 15 mg/m3; TWA 5 mg/m3 NIOSH: IDLH 2500 mg/m3; TWA 5 mg/m3
Stability:	Stable.
Major Application	battery manufacturing
Cosmetics Ingredients Functions	COLORANT
InChI	1S/2Fe.3O
InChIKey	JEIPFZHSYJVQDO-UHFFFAOYSA-N
SMILES	O=[Fe]O[Fe]=O
CAS DataBase Reference	1309-37-1(CAS DataBase Reference)
IARC	3 (Vol. 1, Sup 7) 1987
NIST Chemistry Reference	Iron(iii) oxide(1309-37-1)
EPA Substance Registry System	Ferric oxide (1309-37-1)

Safety Information

• Hazard Codes: Xi
• Risk Statements: 36/37/38
• Safety Statements: 26
• OEB: B
• OEL: TWA: 5 mg/m3
• WGK Germany: -
• RTECS: NO7400000
• TSCA: TSCA listed
• HS Code: 28211000
• Storage Class: 13 - Non Combustible Solids
• Hazardous Substances Data: 1309-37-1(Hazardous Substances Data)
• IDLA: 2,500 mg Fe/m3

Ferric oxide Usage And Synthesis

Physical Properties

Reddish-brown hexagonal crystal; refractive index 2.91; density 5.25g/cm3; Moh’s hardness 6.0; melts at 1565°C; insoluble in water; dissolves in acids.

Occurrence and Uses

Ferric oxide occurs in nature as the mineral hematite. It is the principal ore of iron from which the metal and its alloys are produced. Also, this oxide occurs in the mineral, limonite, 2Fe2O3•3H2O. An important application of this compound involves producing red, orange, and yellow pigments. Other applications are in coatings for metals, steel and rubber; in ceramics; and as a catalyst for oxidation reactions.

Preparation

Ferric oxide is prepared as a reddish-brown hydrated precipitate by treating an aqueous solution of an iron(III) salt with caustic soda:
2FeCl3 + 6NaOH → Fe2O3•3H2O + 6NaCl
It also is obtained by thermal decomposition of iron(II) sulfate or the brown oxide hydroxide:
2FeSO4 → Fe2O3 + SO2 + SO3
2FeO(OH) → Fe2O3 + H2O
The oxide is prepared in industrial scale by first precipitating iron(II) hydroxide Fe(OH)2 by treating aqueous solutions of iron(II) sulfate and caustic soda. The Fe(OH)2 is then oxidized to iron(III) hydroxide by aeration. The latter is dehydrated by heating:
Fe2+ (aq) + OH¯ (aq) → Fe(OH)2(s) → 2Fe(OH)3 → Fe2O3 + 3H2O
It also is produced by ignition of iron(III) oxalate and iron carbonyls:
2Fe2(C2O4)3 +3O2 → 2Fe2O3 + 12CO

Reactions

Ferric oxide decomposes to its elements when heated at elevated temperatures:
2Fe2O3 → 4Fe + 3O2
The oxide is reduced by most reducing agents. Reaction with carbon monoxide at elevated temperatures (that occurs in the blast furnace) gives metallic iron. The overall reaction is mildly exothermic (ΔHrxn –113.4 kcal/mol):
2 Fe2O3 + 6CO → 4Fe + 6CO2
It also is reduced by powdered aluminum at elevated temperatures, forming aluminum oxide and metallic iron:
Fe2O3 + 2Al → Al2O3 + 2Fe
The reaction is highly exothermic and becomes self-sustaining after ignition.
When heated with sand in an electric furnace, iron(III) oxide forms ferrosilicon alloy. When heated in a vacuum at 1,000°C, it forms triiron tetroxide, Fe3O4.

Description

Iron oxides are produced synthetically and consist essentially of anhydrous and/or hydrated iron oxides. The range of hues includesyellows, reds, browns and blacks. Food quality iron oxides are primarily distinguished from technical grades by the comparatively low levels of contamination by other metals. This is achieved by the selection and control of the source of iron and/or by the extent of chemical purification during the manufacturing process. Iron oxides have been used to color confectionery, fillings and decorations for pastry products, cheese products, fish paste, pet foods, cosmetics and pharmaceutical products.

Chemical Properties

Hematite is a noncombustible, black to black red or brick-red mineral (iron ore) composed mainly offerric oxide, Fe2O3. Ferric oxide

Occurrence

Iron(III) oxide occurs in nature as the mineral hematite. It is the principal ore of iron from which the metal and its alloys are produced. Also, this oxide occurs in the mineral, limonite, 2Fe₂O₃?3H₂O. An important application of this compound involves producing red, orange, and yellow pigments. Other applications are in coatings for metals, steel and rubber; in ceramics; and as a catalyst for oxidation reactions.

Uses

Red iron oxide (Fe2O3) is an inorganic pigment of eithernatural or synthetic origin. It is a low chroma red with excellent durabilityand low cost. Synthetic pigment is made by heating iron sulfatewith quicklime in a furnace. The second preparatory technique involvescalcining iron sulfate in the presence of air at high temperatures.Natural and oxides of iron are mined either as the mineral hematite(Fe2O3) or as hematite in its hydrated form.

Uses

As pigment for rubber, paints, paper, linoleum, ceramics, glass; in paint for ironwork, ship hulls; as polishing agent for glass, precious metals, diamonds; in electrical resistors and semiconductors; in magnets, magnetic tapes; as catalyst; colloidal solutions as stain for polysaccharides.

Uses

Ferric Oxide is a nutrient and dietary supplement that is a source of iron.

Definition

A high-grade red pigment usedas a polishing agent for glass, jewelry, etc. (2) Acosmetic prepared from dried flowers of the saf-flower.

Definition

A black solid prepared by passingeither steam or carbon dioxide over redhotiron. It may also be prepared by passingsteam over heated iron(II) sulfide.Triiron tetroxide occurs in nature as themineral magnetite. It is insoluble in waterbut will dissolve in acids to give a mixtureof iron(II) and iron(III) salts in the ratio1:2. Generally it is chemically unreactive; itis, however, a fairly good conductor ofelectricity.

Preparation

Iron(III) oxide is prepared as a reddish-brown hydrated precipitate by treating an aqueous solution of an iron(III) salt with caustic soda:
2FeCl₃ + 6NaOH → Fe₂O₃?3H₂O + 6NaCl
It also is obtained by thermal decomposition of iron(II) sulfate or the brown oxide hydroxide:
2FeSO₄ → Fe₂O₃ + SO₂ + SO₃
2FeO(OH) → Fe₂O₃ + H₂O
The oxide is prepared in industrial scale by first precipitating iron(II) hydroxide Fe(OH)2 by treating aqueous solutions of iron(II) sulfate and caustic soda. The Fe(OH)2 is then oxidized to iron(III) hydroxide by aeration. The latter is dehydrated by heating:
Fe₂+ (aq) + OHˉ (aq) → Fe(OH)₂(s) → 2Fe(OH)₃ → Fe₂O₃ + 3H₂O
It also is produced by ignition of iron(III) oxalate and iron carbonyls:
2Fe₂(C₂O₄)₃ +3O₂ → 2Fe₂O₃ + 12CO
.

Hazard

Pneumoconiosis. Questionable carcinogen.

Flammability and Explosibility

Non flammable

Potential Exposure

Hematite; as an iron ore composedmainly of ferric oxide, is a major source of iron and is usedas a pigment for rubber, paints, paper, linoleum, ceramics,dental restoratives; and as a polishing agent for glass and pre cious metals. It is also used in electrical resistors, semiconduc tors, magnets, and as a catalyst. Human exposure to hematitefrom underground hematite mining is principally throughinhalation and/or ingestion of dusts. No estimates are availableconcerning the number of underground miners exposed.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irri gate immediately for at least15 min, occasionally lifting upper and lower lids. Seek med-ical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, includ-ing resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medi-cal attention. Give large quantities of water and induce :vomiting. Do not make an unconscious person vomit.Note to physician: For severepoisoning，do not useBAL .[British Anti-Lewisite， dimercaprol, dithiopropanol (C3HgOS2)] as it is contraindicated or ineffective in poisoningfrom iron.

Carcinogenicity

Welders are typically exposed to a complexmixture of dust and fume of metallic oxides, aswell as irritant gases, and are subject to mixeddustpneumoconiosis with possible loss of pulmonaryfunction; this should not be confusedwith benign pneumoconiosis caused by ironoxide.1 Although an increased incidence of lungcancer has been observed among hematiteminers exposed to iron oxide, presumablyowing to concomitant radon gas exposure,there is no evidence that iron oxide alone is carcinogenicto man or animals.6

storage

Color Code- Green: General storage may be used.Prior to working with this chemical you should be trainedonits proper handling and storage. Store in tightly closedcontainers in a cool, well-ventilatedarea. .Where possible,automatically transfer material from other storage contain-ers to process containers A regulated, marked area shouldbe established where this chemical is handled, used, orstored in compliance with OSHA Standard 1910.1045.

Properties and Applications

• TEST ITEMS:

  SPECIFICATION

• APPEARANCE:

  DARK RED POWDER

• SHADE:

  CLOSE TO STANDARD

• CONTENT OFFe 2 O 3:

  96% min

• pH VALUE:

  3-7

• OIL ABSORPTION:

  15-25%

• RESIDUE ON 320 MESH:

  0.3% max

• WATER SOLUBLE:

  0.3% max

• VOLATITE 105 °C:

  1.0% max

• TINTING STRENGTH:

  98-102 %

Incompatibilities

Contact with hydrogen peroxide, ethyl ene oxide, calcium hypochlorite will cause explosion.Violent reaction with powdered aluminum; hydrazine,hydrogen trisulfide.

Ferric oxide Preparation Products And Raw materials

• Raw materials: Sodium hydroxide-->Hydrochloric acid-->Sulfuric acid-->Iron-->Ammonium bicarbonate-->Oxygen-->Ferrous sulfate heptahydrate-->Iron oxide-->PYRITE-->3-METHOXYPROPIONIC ACID-->Ferric nitrate-->Micaceous Iron Oxide-->Sodium oleate-->Complexing agent-->Mica-->FERROUS CARBONATE-->Iron Oxide Black-->Aniline sulfate-->Ferric oxalate-->Hematite
• Preparation Products: Oleic acid-->Styrene-->PAINT-->o-Cresol-->Iron oxide red phenolic antirust paint-->Phenolic resin paint-->Triiron tetraoxide-->Various color nitrocellulose exterior enamel Q04-2-->Red lead alkyd antirust paint