Synox BLACK 4318
Iron Oxide Pigment
Product name: Synox BLACK 4318
Chemical name: EC name: Triiron tetraoxide (Fe3O4) EC number: 215-277-5
CAS name: Iron oxide (Fe3O4) CAS number: 1317-61-9
C.I.: Pigment black 11
Synox BLACK 4318 is used in the colouration in a variety of coating applications including paints, plastics, rubber and concrete products
Iron(II,III) oxide is the chemical compound with formula Fe3O4.
It occurs in nature as the mineral magnetite.
It is one of a number of iron oxides, the others being iron(II) oxide (FeO), which is rare, and iron(III) oxide (Fe2O3) which also occurs naturally as the mineral hematite.
It contains both Fe2+ and Fe3+ ions and is sometimes formulated as FeO ∙ Fe2O3.
This iron oxide is encountered in the laboratory as a black powder.
Synox BLACK 4318 exhibits permanent magnetism and is ferrimagnetic, but is sometimes incorrectly described as ferromagnetic.
Its most extensive use is as a black pigment.
For this purpose, Synox BLACK 4318 is synthesized rather than being extracted from the naturally occurring mineral as the particle size and shape can be varied by the method of production.
EC name: Triiron tetraoxide (Fe3O4) EC number: 215-277-5
CAS name: Iron oxide (Fe3O4) CAS number: 1317-61-9
C.I.: Pigment black 11
Formula: Fe3O4
Molecular: 231.53
Hazards: No
Product name: Black 4318
General description
Chemical formula: Synthetic iron oxide Fe3O4
Type: Black iron oxide pigment
Colour index: Pigment black 11 (77499)
CAS NO.: 1317-61-9 EC NO.: 215-277-5
Form: Powder
Hue: Yellowish black
Colour difference in paints :
Mass tone EabL: max 1.0
Test method：ISO787/1
Tint-tone EabL max 1.0
Test method：ISO787/16
Relative tinting strength (%) min 95 max 105
Test method：ISO787/16
Colour difference in cement :
Ecmc max 1.5
3 % Concentration in cement
Relative tinting strength (%): min 95 max 105
3%Concentration in cement
Technical data
Fe3O4 content (%): min 90
Test method：ISO1248/8
Moisture (%) max 1.0
Test method：ISO787/2
Water soluble salts (%): max 0.3
Test method：ISO787/3
Sieve residue on 45m mesh (%): max 0.5
Test method：ISO787/7
pH value min 5.0 max 8.0
Test method：ISO787/9
Oil absorption: min 15 max 25
Test method：ISO787/5
Density (g/cm3): approx. 5.0
Test method：ISO787/10
Apparent density (g/cm3): approx. 1.0
Test method：ISO787/11
Particle shape cubic
Average particle size (m): approx. 0.3