Introduction to Iron Oxide Yellow

Iron Oxide Yellow is a synthetic inorganic pigment primarily composed of hydrated iron oxide (FeOOH), commonly used as a bright, durable, and UV-resistant yellow colorant. This pigment exhibits excellent dispersion, chemical resistance, and compatibility with various binder systems. It is widely used in industries such as coatings, construction, ceramics, plastics, and especially in combination with anatase titanium dioxide to enhance color vibrancy and opacity.

Chemical Composition and Structure

Iron oxide yellow pigments are typically produced via the precipitation and oxidation of iron salts, forming finely divided goethite-type (α-FeOOH) structures. These pigments consist of needle-like particles that provide high tinting strength and UV stability. When used alongside anatase titanium dioxide (TiO₂), the pigment synergizes to create brighter and more stable yellow hues.

• Chemical Formula: FeOOH
• Appearance: Yellow fine powder
• Crystal Structure: Goethite-type (orthorhombic)
• Particle Size: 0.1–0.4 μm (micronized)
• Heat Resistance: Up to 180°C without color change
• UV & Weather Resistance: Excellent
• Compatibility: Suitable with anatase TiO₂, polymers, cement, and ceramic glazes

Applications of Iron Oxide Yellow Pigment

Iron oxide yellow is highly valued for its performance in high-opacity, weather-resistant applications. Common usage includes:

1. Paints and Coatings: Used in water-based and solvent-based systems for long-lasting, non-fading yellow coloration.
2. Construction Materials: Incorporated into concrete, paving blocks, tiles, and stucco for decorative architectural finishes.
3. Plastics and Rubber: Provides stable coloring for PVC, HDPE, rubber, and thermoplastics.
4. Ceramic and Enamel Glazes: Compatible with anatase titanium dioxide in colored glazes for low-temperature firing ceramics.
5. Paper and Pigmented Pastes: Used as a coloring agent for stationery, packaging materials, and adhesives.

Advantages of Iron Oxide Yellow

• ✅ High Opacity: Strong hiding power, especially when combined with TiO₂.
• ✅ UV and Weather Resistance: Excellent stability for outdoor applications.
• ✅ Non-Toxic and Environmentally Safe: Free from heavy metals and compliant with international standards (RoHS, EN71).
• ✅ Cost-Effective: Economical pigment with excellent coloring efficiency.
• ✅ Color Consistency: Stable and repeatable shades across production batches.

Conclusion

Iron Oxide Yellow is a trusted inorganic pigment for manufacturers who demand durability, cost efficiency, and color reliability. Its compatibility with anatase titanium dioxide makes it especially useful in formulations where brightness and opacity are critical. With superior weatherability and environmental safety, it is an essential pigment across industries from coatings to ceramics.