Iron Oxide Black 318

Iron oxide black 318 is an inert, non-toxic and high-quality inorganic black pigment. Due to the stable chemical composition and structure, it is insoluble in water and diluted acids, resistant to acid, lime and alkaline as well as absolutely weather and light stable.

Chemical Formula: Fe2O3.FeO
Tamped Density (g/cm3): 0.9-1.3
Heat stability (℃): 120~150
Particle size: 96%≤45µm
Particle shape: Spherical
Typical properties

Fe3O4 content

90% min

Tinting strength


△E compared with std.

1.0 max

320μ Residue on Sieve

0.5% max

Moisture (105℃)

1.5% max   

Oil absorption (g/100g)


pH value


Water soluble

0.5% max


Iron oxide Black 318 has a strong covering power, and be characterized by its high tinting strength, outstanding light fastness, strong absorption of ultraviolet light and fine dispersing, which make it widely used as colorant for cement products, painting and inks

Black 318 has public accepted color shade, bluish and dark, applied as a universal type.

Main uses:
  • Roofing tile
  • Paving stone
  • Bricks
  • Concrete block
  • Paints
  • Coatings
  • Ink

Kimix Chemical Co.,Ltd is a leading China iron oxide black 318 manufacturer and supplier, we have a professional iron oxide black 318 factory, which can provide you iron oxide black 318 with reliable quality.