| Identification | More | [Name]
Triiron tetraoxide | [CAS]
1317-61-9 | [Synonyms]
BLACK IRON OXIDE
E 172
EISENOXID SCHWARZ
FERRISPEC(R) FP BLACK IRON OXIDE
FERRISPEC(R) FP FINE POWDER BLACK IRON OXIDE
FERRISPEC(R) PL BLACK IRON OXIDE
FERRISPEC(TM) GC
FERRO FERRIC OXIDE
FERROSOFERRIC OXIDE BLACK
FERROUS/FERRIC OXIDE
FERROUS(IC) OXIDE BLACK
IRON(+2,+3)OXIDE
IRON(II) DIIRON(III) OXIDE
IRON(II,III) OXIDE
IRON (II,III) OXIDE, BLACK
IRON (II,III) OXIDE MAGNETOFLUID
IRON (II) OXIDE
IRON OXIDE
IRON OXIDE BLACK
IRON OXIDE PIGMENT BLACK | [EINECS(EC#)]
215-277-5 | [Molecular Formula]
Fe3O4-2 | [MDL Number]
MFCD00011010 | [Molecular Weight]
231.53 | [MOL File]
1317-61-9.mol |
| Chemical Properties | Back Directory | [Appearance]
solid | [Melting point ]
1538 °C(lit.)
| [density ]
4.8-5.1 g/mL at 25 °C(lit.)
| [refractive index ]
3.0 | [Fp ]
7 °C | [storage temp. ]
-20°C | [solubility ]
Insoluble in water and organic solvents. Soluble in concentrated mineral acids. | [form ]
powder
| [color ]
black | [Specific Gravity]
5.2 | [Odor]
at 100.00?%. odorless | [Stability:]
Stable. Incompatible with strong acids, chloroformates, peroxides. | [Water Solubility ]
Insoluble in water and organic solvents. Soluble in concentrated mineral acids. | [Merck ]
14,4040 | [CAS DataBase Reference]
1317-61-9(CAS DataBase Reference) | [NIST Chemistry Reference]
Iron(ii,iii) oxide(1317-61-9) | [EPA Substance Registry System]
1317-61-9(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin .
R67:Vapors may cause drowsiness and dizziness.
R65:Harmful: May cause lung damage if swallowed.
R63:Possible risk of harm to the unborn child.
R48/20:Harmful: danger of serious damage to health by prolonged exposure through inhalation .
R38:Irritating to the skin.
R11:Highly Flammable. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S62:If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label .
S46:If swallowed, seek medical advice immediately and show this container or label .
S36/37:Wear suitable protective clothing and gloves . | [RIDADR ]
3 | [WGK Germany ]
-
| [TSCA ]
Yes | [HS Code ]
28211000 |
| Questions And Answer | Back Directory | [Physical Properties]
Black cubic crystal or amorphous powder; refractive index 2.42; density 5.17 g/cm3; Moh’s hardness 6.0; melts at 1,597°C; insoluble in water, soluble in acids.
| [Occurrence and Uses]
Triiron tetroxide occurs in nature as the mineral magnetite, the magnetic oxide of iron. This mineral along with hematite is used as the starting material for producing iron, steel and other ferro-alloys.
| [Preparation]
Triiron tetroxide is obtained from its natural mineral magnetite. In the laboratory the compound may be prepared by adding sodium hydroxide solution to an aqueous solution of 1:2 molar mixture of ferrous and ferric salt. (i.e., 1 mol FeCl2 + 2 mol FeCl3). The resulting black precipitate of the hydroxide on heating dehydrates to gives triiron tetroxide:
Fe2+(aq) + 2Fe3+(aq) + 8OH¯(aq) → Fe3(OH)8(s)
Fe3(OH)8(s) → Fe3O4(s) + 4H2O(g)
Also, the tetroxide may be produced by partial oxidation of iron or iron(II) sulfate by heating under limited amount of air. Another method of production involves heating iron metal with steam:
3Fe + 4H2O → Fe3O4 + 4H2
| [Reactions]
Triiron tetroxide, when heated at elevated temperatures with a reducing agent such as hydrogen or carbon monoxide in the absence of air, produces metallic iron:
Fe3O4 + 4H2 → 3Fe + 4H2O
Partial reduction gives iron(II) oxide. When treated with concentrated acids, the tetroxide dissolves in acids forming mixtures of iron(II) and iron(III) salts:
Fe3O4 + 8HCl → FeCl2 + 2FeCl3 + 4H2O
Fe3O4 + 4H2SO4 → FeSO4 + Fe2(SO4)3 + 4H2O
|
| Hazard Information | Back Directory | [Chemical Properties]
Magnetite (Fe3O4) constitutes the richest ore
of iron; it is black and magnetic, one variety being called "lodestone". | [Chemical Properties]
solid | [Uses]
Triiron tetraoxide can be used as pigment in paints, linoleum, ceramic glazes; in coloring glass; as a polishing compound; in the textile industry; in cathodes; as catalyst.
| [General Description]
Concentration 5mg/ml includes total weight nanocrystals plus ligands. | [Flammability and Explosibility]
Nonflammable(100%) | [Properties and Applications]
|
TEST ITEMS
|
SPECIFICATION
|
|
APPEARANCE
|
BLACK POWDER
|
|
CONTENT OF
Fe
3
O
4
|
90% min
|
|
pH VALUE
|
5-8
|
|
DENSITY
|
4.5 g/ml
|
|
SHADE
|
CLOSE TO STANDARD
|
|
OIL ABSORPTION
|
10-20%
|
|
RESIDUE ON 320 MESH
|
0.3% max
|
|
WATER SOLUBLE
|
0.3% max
|
|
VOLATITE 105 °C
|
1.0% max
|
|
TINTING STRENGTH
|
98-102 %
|
|
|
|