Technical specifications
| PARAMETER | SPECIFICATION | TEST METHOD |
|---|---|---|
| CAS Number | 51274-00-1 | — |
| Chemical Formula | α-FeOOH (synthetic goethite) | — |
| HS Code | 2821.10 | — |
| Fe₂O₃ Content (as Fe₂O₃ equivalent) | ≥ 85.0 % | ISO 1248 |
| Appearance | Yellow to golden yellow powder | Visual |
| Oil Absorption | 25 – 45 g/100g | ISO 787-5 |
| Water-Soluble Matter | ≤ 0.5 % | ISO 787-3 |
| pH (10% slurry) | 5.0 – 8.0 | ISO 787-9 |
| Heat Stability | Up to 180°C (converts to Fe₂O₃ red above 180°C) | — |
| Lightfastness | Excellent — Grade 7–8 (Blue Wool Scale) | ISO 105-B02 |
| Particle Size (D50) | 0.3 – 0.8 μm (grade dependent) | Laser diffraction |
| Packing | 25 kg PP bags, 500–1,000 kg Supersacks | — |
Applications
- Architectural Paints — Earth Tones — Primary pigment for yellow, ochre, sand, and buff-tone architectural paints popular in UAE and Saudi Arabia buildings — particularly for Islamic architecture, heritage projects, and desert-tone palettes suited to GCC aesthetic preferences.
- Concrete & Paving Colouring — Produces yellow and buff concrete paving blocks, roof tiles, and precast concrete elements.
- Industrial Primers & Anti-Corrosion Coatings — Used in yellow chromate-alternative primers and industrial maintenance coatings where iron oxide yellow provides corrosion-inhibiting properties without the environmental concerns of lead or chromate pigments.
- Decorative & Textured Coatings — Produces earth-tone textured wall coatings for interior and exterior applications.
- Roof Coatings & Waterproofing — Colourant for elastomeric roof coatings and waterproofing membranes — provides yellow and ochre tones stable under intense GCC sunlight.
Key properties
- Excellent lightfastness — Grade 7–8 (Blue Wool) under GCC UV
- Full alkali resistance — stable in cement and concrete systems
- Non-toxic — no lead, chromium VI, or heavy metal hazards
- SASO and REACH documentation available on request
- Heat stable to 180°C (note: converts to red Fe₂O₃ above 180°C)
- Good tinting strength — cost-effective colour delivery
- Produces buff, ochre, and yellow tones from one pigment
- Compatible with all standard binder systems
Usage and recommendations
Typical loading: 2–12% by weight in architectural paints. For buff/ochre tones, blend with iron oxide red and titanium dioxide. Note the 180°C heat stability limit — do not use in powder coatings or stoving systems above this temperature (use iron oxide red or brown instead). For concrete: 1–5% by cement weight. Disperse thoroughly in grinding mill — yellow iron oxides have higher oil absorption than red grades and require more dispersant attention.
Packaging
- 25 kg PP Woven Bags
- 500 kg Supersacks
- 1,000 kg Jumbo Bags
- Custom packing on request
Storage and shelf life
Store in original sealed bags in a cool, dry warehouse away from moisture. No defined shelf life when stored dry — maintain FIFO stock rotation.