Supplier Related Products Identification Chemical Properties Safety Data Raw materials And Preparation Products Hazard Information Questions And Answer Spectrum Detail Well-known Reagent Company Product Information
WebSite >  CAS DataBase List  > 1309-37-1

1309-37-1

Supplier Related Products Identification Chemical Properties Safety Data Raw materials And Preparation Products Hazard Information Questions And Answer Spectrum Detail Well-known Reagent Company Product Information

Product Image

Identification

Name
Ferric oxide
CAS
1309-37-1
Synonyms
IRON(III) OXIDE DIHYDRATE
11554red
anchredstandard
anhydrousironoxide
anhydrousoxideofiron
armenianbole
bauxiteresidue
blackoxideofiron
blendedredoxidesofiron
burntislandred
burntsienna
c.i.pigmentred101
c.i.pigmentred101and102
c.i.pigmentred102
calcotonered
caputmortuum
colcothar
colloidalferricoxide
crocusmartisadstringens
deanox
EINECS(EC#)
215-168-2
Molecular Formula
Fe2O3
MDL Number
MFCD00748135
Molecular Weight
159.69
MOL File
1309-37-1.mol

Chemical Properties

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.
Appearance
Hematite is a noncombustible, black to black red or brick-red mineral (iron ore) composed mainly of ferric oxide, Fe2O3. Ferric oxide
Appearance
red to reddish-brown powder
mp 
1538°C
density 
5.24
Fp 
>230 °F

form 
pieces

Stability:
Stable.
Water Solubility 
INSOLUBLE
Merck 
14,4028
Uses
Ferric Oxide is a nutrient and dietary supplement that is a source of iron.
CAS DataBase Reference
1309-37-1(CAS DataBase Reference)
NIST Chemistry Reference
Iron(iii) oxide(1309-37-1)
EPA Substance Registry System
1309-37-1(EPA Substance)

Safety Data

Hazard Codes 
Xi,F
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
RIDADR 

WGK Germany 
-

RTECS 
NO7400000

HS Code 
28211000
Hazardous Substances Data
1309-37-1(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

Hazard
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.
First aid
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, includ ing resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. 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.

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

Questions And Answer

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.

Spectrum Detail

Well-known Reagent Company Product Information

SupplierMore