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Chemically produced pure iron oxide pigments are excellently lightfast, opaque and stable in any medium.
They are especially recommended for outside applications, in cement and lime.
Color range is equivalent to earth colors, from yellow to dark violet-brown.
CAS: 1332-37-2
MF: Fe2O3
MW: 159.69
EINECS: 215-570-8
Iron oxide pigments are the most often used colour pigments in the world.
They are available in the primary colours yellow (FeOOH), black (Fe3O4) and red (Fe2O3), but also as a mixture in orange, beige and brown shades.
As the mineral hematite, Iron oxide pigment is the main source of iron for the steel industry.
Iron oxide pigment is easily attacked by acids.
Iron oxide pigment is regularly called rust, and to some extent this label is useful, as rust shares several properties and has a comparable composition.
To a chemist, though, rust is thought of as an ill-defined material, described as hydrated ferric oxide.
Iron oxide pigment can be formed in various polymorphs.
Iron oxide pigment or ferric oxide is the inorganic compound with the formula Fe2O3.
Iron oxide pigment is one of the three main oxides of iron, the other two being iron(II) oxide (FeO), which is rare; and iron(II,III) oxide (Fe3O4), which also occurs naturally as the mineral magnetite.
As the mineral known as hematite, Iron oxide pigment is the main source of iron for the steel industry.
Iron oxide pigment is readily attacked by acids.
Iron oxide pigment is often called rust, and to some extent this label is useful, because rust shares several properties and has a similar composition; however, in chemistry, rust is considered an ill-defined material, described as Hydrous ferric oxide.
Iron oxide pigment Chemical Properties
Density: 2.66 g/cm3
Storage temp.: -70°C
Solubility: Aqueous Acid (Slightly)
Form: Solid
Color: Black
EPA Substance Registry System: Iron oxide pigment (1332-37-2)
Uses
Iron oxide pigments, which may be natural or synthetic, have been used as colorants since early humans began painting on cave walls.
Natural pigments are derived from several iron oxide minerals: Red pigments are derived from hematite.
Yellow and brown pigments — ochres, sierras and umbers — are derived from limonite. Magnetite provides a black iron oxide pigment.
Iron oxide pigment is a special form of hematite that occurs in thin metallic gray platelets or flakes.
Synthetic pigments are manufactured under controlled conditions such that particle size, distribution and shape can be accurately replicated, resulting in superior uniformity, color quality and chemical purity.
Iron oxide pigments are relatively low-cost materials that resist color change due to exposure to sunlight, have good chemical resistance and are stable under normal ambient conditions.
The leading uses of the pigments are in paints, coatings and construction materials such as in concrete products, mortar, paving stones and roofing tiles.
Natural pigments are used in primers and undercoats, where color consistency is less critical, whereas synthetic pigments are used in topcoat paints where color consistency is important.
Iron oxide pigment imparts unique properties to paints and coatings because the flaky particles align in such a way as to resist penetration by moisture and gases.
These coatings can prevent corrosion and rusting of metals and also resist blistering, cracking and peeling.
Deposits of iron oxide pigment occur in many countries, but have been significantly developed in only a few.
Countries known for production of iron oxide pigments historically include Cyprus, France, Iran, Italy and Spain.
Countries with recent significant production include India, Spain and Honduras.
Iron oxide pigments are also created through steelmaking.
When steel is treated with hydrochloric acid to remove surface oxides, the acid is regenerated to be recycled and Iron oxide pigment is produced.
Regenerated Iron oxide pigments are used in a variety of filters, inductors and transformers in electronic home appliances and industrial equipment, as well as in flexible magnets, generators, loudspeakers and electric car motors.
Iron oxide pigments are used as colorants for ceramic glazes, glass, paper, plastic, rubber and textiles as well as in cosmetics and magnetic ink and toner.
Iron oxide pigment (iron oxide black, red, or yellow) is an inorganic compound frequently used to add color to cosmetics.
Iron oxide pigment may have some slight sun screening ability.
Iron oxide pigment can vary in color from red to brown, black to orange or yellow, depending on the purity and amount of water added.
Iron oxide pigment is a trace mineral used as a pigment and colorant.
Iron oxide pigment is used to color pet food.
Iron oxide pigment is the fine red abrasive component of rouge.
Like tripoli, rouge is blended with various soft binders into a cake form.
Iron oxide pigment is used to polish high noble metal alloys such as yellow gold alloys.
Synonyms:
AM 125;
Ancor FR;
Ancor FY;
Auvico AX 1000;
AX 1000;
BUS;
EP-A 0014382;
Nano iron oxide used in Ink
