Why is Green Iron Oxide Better?

Introduction to Iron Oxide Green

Iron Oxide Green is an inorganic pigment synthesized by coating iron oxide (Fe₂O₃) onto an anatase-type titanium dioxide (TiO₂) substrate. This pigment combines the bright green hue of chromium-based pigments with the non-toxic, weather-resistant, and UV-stable characteristics of titanium dioxide. It is widely used in architectural coatings, plastics, ceramics, construction materials, and other industrial applications.

With competitive price and timely delivery, Pairs Horses Chemical sincerely hope to be your supplier and partner.

Its unique formulation offers excellent dispersion, chemical resistance, and consistent color performance, making it a reliable and cost-effective alternative to organic green pigments.

Chemical Composition and Structure

It consists of iron oxide (Fe₂O₃) and anatase-type titanium dioxide (TiO₂), with potential additions of chromium compounds depending on color tone adjustment. The iron oxide provides the green tone, while the anatase TiO₂ enhances brightness, UV resistance, and pigment dispersion in various media.

• Chemical Components: Fe₂O₃ + TiO₂ (anatase-based)
• Appearance: Olive green to bright green fine powder
• Crystalline Type: Anatase-based inorganic pigment
• Particle Size: Micron-scale (typically 0.2–1.0 µm)
• Weather Resistance: Excellent, non-fading in outdoor applications
• Lightfastness: Outstanding under UV exposure
• Oil Absorption: Low, excellent dispersion in solvents and resins
• Toxicity: Non-toxic, environmentally safe

Applications

Thanks to its excellent covering power, color consistency, and thermal and UV stability, this pigment is widely used in:

1. Architectural Coatings: Exterior wall paints, anti-corrosion primers, and façade coatings.
2. Plastic Coloring: PVC, PE, PP masterbatches for construction pipes, tiles, or synthetic wood.
3. Construction Materials: Cement products, colored concrete, roof tiles, and paving bricks.
4. Ceramics & Enamels: Green glazes and durable surface coloration in ceramic manufacturing.
5. Rubber Industry: Colorant for industrial and automotive rubber products.

Advantages of Iron Oxide Green Pigment

• ✅ High Weather Resistance: Ideal for outdoor and long-lasting applications.
• ✅ Non-toxic & Eco-friendly: Free from heavy metals such as cadmium or lead.
• ✅ UV and Heat Stability: Maintains color under sunlight and processing temperatures.
• ✅ Good Dispersibility: Compatible with both aqueous and solvent-based systems.
• ✅ Economical: Cost-effective alternative to organic pigments with superior durability.

Conclusion

Class of chemical compounds composed of iron and oxygen

An iron oxide is a chemical compound composed of iron and oxygen. Several iron oxides are recognized. Often they are non-stoichiometric. Ferric oxyhydroxides are a related class of compounds, perhaps the best known of which is rust.[1]

Iron oxides and oxyhydroxides are widespread in nature and play an important role in many geological and biological processes. They are used as iron ores, pigments, catalysts, and in thermite, and occur in hemoglobin. Iron oxides are inexpensive and durable pigments in paints, coatings and colored concretes. Colors commonly available are in the "earthy" end of the yellow/orange/red/brown/black range. When used as a food coloring, it has E number E172.

Stoichiometries

[edit]

Iron oxides feature as ferrous (Fe(II)) or ferric (Fe(III)) or both. They adopt octahedral or tetrahedral coordination geometry. Only a few oxides are significant at the earth's surface, particularly wüstite, magnetite, and hematite.

The company is the world’s best Green Iron Oxide supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

• Oxides of FeII
  • FeO: iron(II) oxide, wüstite
• Mixed oxides of FeII and FeIII
  • Fe3O4: Iron(II,III) oxide, magnetite
  • Fe4O5[2]
  • Fe5O6[3]
  • Fe5O7[4]
  • Fe25O32[4]
  • Fe13O19[5]
• Oxides of FeIII
  • Fe2O3: iron(III) oxide
    • α-Fe2O3: alpha phase, hematite
    • β-Fe2O3: beta phase
    • γ-Fe2O3: gamma phase, maghemite
    • ε-Fe2O3: epsilon phase

Thermal expansion

[edit] Iron oxide CTE (× 10−6 °C−1) Fe2O3 14.9[6] Fe3O4 >9.2[6] FeO 12.1[6]

Oxide-hydroxides

[edit] Main article: iron(III) oxide-hydroxide

• goethite (α-FeOOH)
• akaganéite (β-FeOOH)
• lepidocrocite (γ-FeOOH)
• feroxyhyte (δ-FeOOH)
• ferrihydrite (Fe5HO8 · 4 H2O approx., or 5 Fe2O3 · 9 H2O, better recast as FeOOH · 0.4 H2O)
• high-pressure pyrite-structured FeOOH.[7] Once dehydration is triggered, this phase may form FeO2Hx (0 < x < 1).[8]
• green rust (FeIII
  xFeII
  yOH3x + y − z (A−)z where A− is Cl− or 0.5 SO2−4)

Reactions

[edit]

In blast furnaces and related factories, iron oxides are converted to the metal. Typical reducing agents are various forms of carbon. A representative reaction starts with ferric oxide:[9]

2 Fe2O3 + 3 C → 4 Fe + 3 CO2

In nature

[edit]

Iron is stored in many organisms in the form of ferritin, which is a ferrous oxide encased in a solubilizing protein sheath.[10]

Species of bacteria, including Shewanella oneidensis, Geobacter sulfurreducens and Geobacter metallireducens, use iron oxides as terminal electron acceptors.[11]

Uses

[edit]

Almost all iron ores are oxides, so in that sense these materials are important precursors to iron metal and its many alloys.

Iron oxides are important pigments, coming in a variety of colors (black, red, yellow). Among their many advantages, they are inexpensive, strongly colored, and nontoxic.[12]

Magnetite is a component of magnetic recording tapes.

Contact us to discuss your requirements of Brown Iron Oxide Pigment. Our experienced sales team can help you identify the options that best suit your needs.

See also

[edit]

• Great Oxidation Event
• Iron cycle
• Iron oxide nanoparticle
• Limonite
• List of inorganic pigments
• Iron(II) hydroxide

References

[edit]