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Iron Oxide

Other names: Black iron oxide pigment, Red iron oxide pigment

International name: Iron oxide, Ferric oxide

Chemical formula: Fe₂O₃, Fe₃O₄, FeO(OH)·nH₂O

Packaging: 25 kg bags, big bags

Country of manufacture: China, Russia, Germany, India

Colors: red, black, yellow, brown

Price: Price on request

Description
Features
Application

Iron oxide is an inorganic compound of iron and oxygen, widely used in industry as a durable, environmentally friendly pigment. Depending on the form and oxidation state of iron, several main types are distinguished: red (Fe₂O₃), black (Fe₃O₄), yellow (hydrate FeO(OH)), and brown. Each of them has high hiding power, lightfastness, and chemical stability.
Iron oxides are insoluble in water, resistant to ultraviolet light, alkaline and acidic environments, and do not fade, which makes them especially in demand in construction, paints and coatings, ceramics, plastics, and rubber production. Being natural and non-toxic pigments, they are used in formulations requiring stable color, durability, and safety.

Characteristic	Value
Fe₂O₃ content, %	≥ 96–98
Color	From brick red to dark red
Particle size (D₉₀), µm	≤ 5–10
Specific gravity, g/cm³	~5.1
Bulk density, g/cm³	0.6–1.0
Melting point	~1565 °C
Alkali/acid resistance	High
Stability to UV, light, atmosphere	Excellent
Oil absorption, g/100 g	15–25 (depends on type)
Heat resistance	Up to 800–900 °C (in paints and coatings)
Water solubility	Insoluble

Construction and architecture — used as a pigment for coloring concrete, paving slabs, bricks, plasters, grouts, and dry building mixes. Provides stable, saturated shades resistant to fading.
Paints and coatings industry — used in anticorrosion and facade paints, decorative coatings, primers, especially for metal and reinforced concrete. Ensures excellent hiding power and durability.
Ceramics and glazes — added to ceramic bodies, enamels, and glazes to give red, brown, and black shades.
Plastics and rubber — serves as a heat-resistant pigment resistant to deformation and UV radiation.
Cosmetics (in limited forms) — used in the production of natural pigments for decorative cosmetics (with a high degree of purification).
Metallurgy — used as a source of iron in smelting and alloying.