Brief Introduction:
Iron Oxide Black, also known as ferrosoferric oxide, magnetic iron oxide, or Pigment Black 11, is a black or black-red powder with the chemical formula Fe₃O₄. It is a synthetic pigment produced through chemical reaction, typically obtained by the Laux or precipitation processes. It has a density ranging from 4.6 to 5.18 g/cm³ depending on the specific grade, and melts at approximately 1594°C. This pigment is non-toxic, insoluble in water and alcohols, and dissolves only in concentrated or hot strong acids. It exhibits excellent covering power, high tinting strength, and good light fastness and weather resistance. At temperatures above 200-300°C, it is gradually oxidized in air and transforms into red iron oxide. It has magnetic properties and is stable under normal conditions.
Specifications:
| Test Item | Specification |
|---|---|
| Appearance | Black Powder |
| Full Shade (Compared with standard) | Similar--little |
| Tinting Strength (Compared with standard)% | 100±5 |
| Fe3O4 Content%, (m/m) | 90 |
| Matter Volatile at 105°C %≤ | 1 |
| Water Soluble Matter%≤ | 0.5 |
| Oil Absorption g/100g | 15~25 |
| Fineness (Residues on 45 μm mesh sieve)%≤ | 1 |
| Ph Value | 5~7 |
Features:
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High covering power and tinting strength
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Excellent light fastness and weather resistance
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Good resistance to alkalis
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Resistant to dilute acids; dissolves in concentrated hot acids
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Non-toxic and insoluble in water
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Stable under normal conditions with good resistance to solvents
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Exhibits magnetic properties
Applications:
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Used as a pigment in paints, coatings (waterborne and solventborne), and anti-rust coatings
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Applied in the coloring of plastics and rubber products
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Utilized in the manufacture of ceramics and building materials (concrete, bricks, tiles)
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Incorporated in the coloring of inks, watercolors, and oil paints
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Used in the production of magnetic materials (magnetic steel), recording media, and magnetic coatings
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Employed in the electronics industry (alkaline dry battery cathode plates) and steel flaw detection
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Suitable for use in cosmetics and personal care products (subject to regulatory compliance)
Package and Storage:
Iron Oxide Black is typically packaged in 25 kg bags (paper/plastic) or as per customer requirements. It should be stored in a cool, dry place, away from moisture and direct sunlight, and protected from weathering. Ensure the packaging is tightly sealed after use to prevent contamination and absorption of moisture. Avoid exposure to temperatures above 80°C during storage, as irreversible color changes may occur. Proper handling and storage will ensure the longevity and effectiveness of the pigment, with a recommended shelf life of up to 10 years under optimal conditions.