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Ferric oxide

Physical Properties Occurrence and Uses Preparation Reactions
Ferric oxide
Ferric oxide structure
CAS No.
1309-37-1
Chemical Name:
Ferric oxide
Synonyms
supra;ochre;deanox;raddle;rubigo;ferrugo;ironred;marsred;CI 77015;lightred
CBNumber:
CB3115644
Molecular Formula:
Fe2O3
Formula Weight:
159.69
MOL File:
1309-37-1.mol

Ferric oxide Properties

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
Merck 
14,4028
Stability:
Stable.
CAS DataBase Reference
1309-37-1(CAS DataBase Reference)
FDA 21 CFR
186.1300; 73.1200; 73.200
Substances Added to Food (formerly EAFUS)
FERRIC OXIDE
SCOGS (Select Committee on GRAS Substances)
Ferric oxide
Ferric oxide (packaging)
EWG's Food Scores
1-2
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
  • Risk and Safety Statements
Symbol(GHS) 
GHS02,GHS05
Signal word  Danger
Hazard statements  H225-H318
Precautionary statements  P210-P280-P305+P351+P338+P310-P370+P378-P403+P235
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26
WGK Germany  -
RTECS  NO7400000
TSCA  Yes
HS Code  28211000
NFPA 704
1
1 0

Ferric oxide price More Price(67)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 12342 Iron(III) oxide purified, ≥95% 1309-37-1 1kg $61.9 2021-12-16 Buy
Sigma-Aldrich 700320 Iron oxide(II,III), magnetic nanoparticles solution 5?nm avg. part. size, 5?mg/mL in toluene 1309-37-1 5 mL $210 2021-12-16 Buy
Sigma-Aldrich 700304 Iron oxide(II,III), magnetic nanoparticles solution 20?nm avg. part. size, 5?mg/mL in toluene 1309-37-1 5 mL $192 2021-12-16 Buy
Sigma-Aldrich 700312 Iron oxide(II,III), magnetic nanoparticles solution 10?nm avg. part. size, 5?mg/mL in toluene 1309-37-1 5 mL $245 2021-12-16 Buy
Sigma-Aldrich 12342 Iron(III) oxide purified, ≥95% 1309-37-1 6x1kg $272 2021-12-16 Buy

Ferric oxide Chemical Properties,Uses,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.
red iron oxide powder

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

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.

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

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.

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.

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.

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

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

Preparation Products


Ferric oxide Suppliers

Global( 326)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
SINOPRO.CO.LTD
0082-42-721-7177
0082-42-3676760 michael@sinopro.co.kr South Korea 300 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com China 22607 55
Hangzhou FandaChem Co.,Ltd.
008615858145714
+86-571-56059825 fandachem@gmail.com CHINA 9115 55
Shanghai Zheyan Biotech Co., Ltd.
18017610038
zheyansh@163.com CHINA 3623 58
career henan chemical co
+86-0371-55982848
sales@coreychem.com China 29954 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 linda@hubeijusheng.com CHINA 28229 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114
sales@amoychem.com CHINA 6369 58
Hubei xin bonus chemical co. LTD
86-13657291602
027-59338440 linda@hubeijusheng.com CHINA 23035 58
Shandong chuangyingchemical Co., Ltd.
18853181302
sale@chuangyingchem.com CHINA 5917 58
BOC Sciences
1-631-485-4226
1-631-614-7828 inquiry@bocsci.com United States 19752 58

View Lastest Price from Ferric oxide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-11-08 Ferric oxide
1309-37-1
US $10.00 / KG 1KG 99.9% 100MT/Month Wuhan wingroup Pharmaceutical Co., Ltd
2021-10-14 High Quality Pigment Iron Oxide Red
1309-37-1
US $1.00 / KG 1KG 99.9% 20tons Hebei Dongdu Import and Export Co. LTD
2021-08-31 Iron(III) oxide
1309-37-1
US $50.00 / KG 1Kg/Bag 99.99% 20 tons/month Wuhan Monad Medicine Tech Co.,LTD

Ferric oxide Spectrum


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