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High thermal stability up to 800 °C, ensuring color integrity in high-temperature processing.
Excellent lightfastness and weather resistance, maintaining hue consistency under prolonged UV exposure.
Non-toxic and heavy-metal-free formulation, compliant with global regulatory standards including EN 71-3 and RoHS.
Superior dispersion performance in aqueous and solvent-based systems, minimizing agglomeration and enhancing batch uniformity.
Consistent particle size distribution for optimal opacity and tinting strength across diverse binder systems.
Architectural and industrial coatings requiring durable earth-tone aesthetics.
Cementitious products including concrete block, stucco, and terrazzo flooring.
Ceramic glazes and clay-based tiles for kiln-fired color stability.
Plastic compounds for outdoor applications such as garden furniture and construction profiles.
Oil-based and alkyd paints for heritage restoration and decorative finishes.
| Chemical Type | Natural ochre-derived iron oxide (Fe₂O₃-based) |
| Product Form | Fine dry powder |
| Appearance | Free-flowing reddish-brown granular powder |
| Primary Applications | Coatings, construction materials, ceramics, plastics |
| Key Features | Heat stable, UV resistant, non-hazardous, alkali resistant |
| Benefits | Low dosage requirement, low oil absorption, pH-neutral |
| Density (g/cm³) | 3.9–4.2 |
| Volatile Matter (wt%, 105 °C) | ≤ 1.0% |
Q1: What is the primary chemical composition of Cathay Hoover 113NO?
A: Cathay Hoover 113NO is an iron oxide-based inorganic pigment, primarily composed of hydrated or calcined iron(III) oxide (Fe₂O₃), with minor natural or synthetic impurities consistent with high-purity ochre pigments. Its color and performance are derived from its crystalline structure and particle morphology, not organic additives.
Q2: Is this pigment suitable for use in exterior architectural coatings?
A: Yes — as a naturally stable inorganic oxide, 113NO exhibits excellent UV resistance, thermal stability, and weatherfastness, making it well-suited for long-term outdoor applications such as masonry paints, stucco, and cementitious renders where color retention and alkali resistance are critical.
Q3: How does 113NO perform in high-pH systems like concrete or lime plasters?
A: It demonstrates strong compatibility with alkaline environments due to the inherent chemical inertness of iron oxides. Unlike many organic pigments, 113NO does not undergo significant fading, blooming, or reactivity when incorporated into fresh or cured cementitious or lime-based matrices.
Q4: Can this pigment be used in food-contact construction materials?
A: While 113NO is an inorganic iron oxide pigment with low solubility and minimal leaching potential, its suitability for food-contact applications depends on full regulatory assessment by the end-user’s compliance team. It is not pre-certified for direct food contact, but may be considered for indirect contact scenarios (e.g., exterior surfaces of food processing facilities) subject to local authority approval.
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