Physical Properties Occurrence and Uses Preparation Reactions
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Ferric oxide

Physical Properties Occurrence and Uses Preparation Reactions
Product Name
Ferric oxide
CAS No.
1309-37-1
Chemical Name
Ferric oxide
Synonyms
Diiron Trioxide;Pigment red 101;Red Ferric Oxide;supra;ochre;deanox;raddle;rubigo;ferrugo;ironred
CBNumber
CB3115644
Molecular Formula
Fe2O3
Formula Weight
159.69
MOL File
1309-37-1.mol
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Ferric oxide Property

Melting point:
1538°C
Density 
5.24
Flash point:
>230 °F
storage temp. 
2-8°C
solubility 
It is soluble In Warm Hydrochloric Acid, Slightly Soluble in Sulfuric Acid.
form 
pieces
color 
black
Specific Gravity
5.1～5.2
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/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.502590.502591.373590901200.3005
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.
CAS DataBase Reference
1309-37-1(CAS DataBase Reference)
NIST Chemistry Reference
Iron(iii) oxide(1309-37-1)
IARC
3 (Vol. 1, Sup 7) 1987
EPA Substance Registry System
Ferric oxide (1309-37-1)
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Safety

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26
OEB
B
OEL
TWA: 5 mg/m3
WGK Germany 
-
RTECS 
NO7400000
TSCA 
Yes
HS Code 
28211000
Hazardous Substances Data
1309-37-1(Hazardous Substances Data)
IDLA
2,500 mg Fe/m3
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H225Highly Flammable liquid and vapour

H318Causes serious eye damage

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P280Wear protective gloves/protective clothing/eye protection/face protection.

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N-Bromosuccinimide Price

Alfa Aesar
Product number
010716
Product name
Iron(III) oxide, Puratronic?, 99.998% (metals basis)
Packaging
25g
Price
$171
Updated
2023/06/20
Alfa Aesar
Product number
010716
Product name
Iron(III) oxide, Puratronic?, 99.998% (metals basis)
Packaging
100g
Price
$509
Updated
2023/06/20
Sigma-Aldrich
Product number
747335
Product name
Iron oxide(II,III) magnetic nanoparticles solution
Packaging
2ml
Price
$648
Updated
2024/03/01
Sigma-Aldrich
Product number
720712
Product name
Iron(III) oxide, dispersion
Purity
nanoparticles, ≤110 nm particle size, 15 wt. % in ethanol
Packaging
100g
Price
$222
Updated
2024/03/01
Sigma-Aldrich
Product number
544884
Product name
Iron(III) oxide
Purity
nanopowder, <50 nm particle size (BET)
Packaging
5g
Price
$44.9
Updated
2024/03/01
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Ferric oxide Chemical Properties,Usage,Production

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 of ferric 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

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

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

Red iron oxide (Fe2O3) is an inorganic pigment of either natural or synthetic origin. It is a low chroma red with excellent durability and low cost. Synthetic pigment is made by heating iron sulfate with quicklime in a furnace. The second preparatory technique involves calcining 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.

Definition

A black solid prepared by passing either steam or carbon dioxide over redhot iron. It may also be prepared by passing steam over heated iron(II) sulfide. Triiron tetroxide occurs in nature as the mineral magnetite. It is insoluble in water but will dissolve in acids to give a mixture of iron(II) and iron(III) salts in the ratio 1:2. Generally it is chemically unreactive; it is, however, a fairly good conductor of electricity.

Definition

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

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 composed mainly of ferric oxide, is a major source of iron and is used as 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 hematite from underground hematite mining is principally through inhalation and/or ingestion of dusts. No estimates are available concerning 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 complex mixture of dust and fume of metallic oxides, as well as irritant gases, and are subject to mixeddust pneumoconiosis with possible loss of pulmonary function; this should not be confused with benign pneumoconiosis caused by iron oxide.1 Although an increased incidence of lung cancer has been observed among hematite miners exposed to iron oxide, presumably owing to concomitant radon gas exposure, there is no evidence that iron oxide alone is carcinogenic to 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 OF Fe 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

3-METHOXYPROPIONIC ACID Iron ore Aniline sulfate FERROUS CARBONATE Iron filings Ferric oxalate Transparent iron oxide Iron oxide Oxygen Iron Oxide Black Ferric nitrate Micaceous Iron Oxide Hematite Mica Sodium oleate Hydrochloric acid Sodium hydroxide Transparent iron oxide red Iron PYRITE Complexing agent Iron oxide red Ferrous sulfate heptahydrate Ammonium bicarbonate Sulfuric acid

Preparation Products

Red lead alkyd antirust paint Phenolic resin paint Styrene o-Cresol Iron oxide red phenolic antirust paint PAINT Various color nitrocellulose exterior enamel Q04-2 Oleic acid Triiron tetraoxide
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View Lastest Price from Ferric oxide manufacturers

Hebei Andu Technology Com.,Ltd
Product
Ferric oxide 1309-37-1
Price
US $3.50/kg
Min. Order
1kg
Purity
0.99
Supply Ability
3000tons/month
Release date
2024-08-18
HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
Product
Ferric oxide 1309-37-1
Price
US $100.00-75.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
5000
Release date
2024-08-21
Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
Ferric oxide 1309-37-1
Price
US $50.00-30.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
5000kg/Month
Release date
2024-04-28

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