Red Oxide Inorganic Pigment

• Customization: Available
• CAS No.: 1309-37-1
• Formula: Fe2o3
• Model NO.: 130
• EINECS: 215-570-8
• Classification: Iron Oxide
• Grade Standard: Industrial Grade
• Kind: Acidic Oxide
• Quality: First Class
• Sample: Free
• Payment: Tt, Da, Dp.LC
• HS: 3204170090
• Transport Package: Carton
• Specification: 25KG/BAG
• Trademark: Morni
• Origin: Jiang Xi
• Production Capacity: 1000000kgs/Year

Product Description

Product Description

 

Basic Information

• Chemical Name: Fe2O3⋅αH2O (Iron(III) Oxide Monohydrate)
• Color Index Number: Pigment Red 101 (77491)
• CAS No. / EC No.: 1309-37-1 / 215-168-2
• Product Form: Powder

Physical Properties

• Appearance: Red powder
• Relative Density: Approximately 5.0; tapped density is 1.0 g/cm³
• Particle Shape: Spherical
• Oil Absorption: 15-25 mL/100g
• pH Value: 3-7
• Moisture Content: ≤1.0%
• Water-Soluble Substances: ≤0.3%
• 325-Mesh Wet Sieve Residue: ≤0.3%

Chemical Properties

• Main Component Content: Content of Fe2O3⋅αH2O ≥96.0%
• Stability:
  Possesses excellent light fastness and high-temperature resistance, capable of withstanding high temperatures of 1665-1770ºC and above. It is stable in the atmosphere and sunlight, resistant to polluted gases and all types of alkalis, and also has rust-proof and UV-resistant properties.
  Chemically stable, it is insoluble in water and organic solvents, soluble in hydrochloric acid and sulfuric acid, and slightly soluble in nitric acid.

Performance Characteristics

• Tinting Strength: Strong tinting strength, ranging from 95% to 105%
• Hiding Power: High hiding power, which can effectively cover the surface of substrates and present a bright red color

Applications

• Building Materials: Used for coloring wall bricks, cement, paving bricks, etc.
• Coatings and Paints: Suitable for various paints and coatings, such as water-based interior and exterior wall coatings, powder coatings, oil-based paints, etc.
• Plastics and Rubbers: Used for coloring plastic and rubber products, such as automobile inner tubes, bicycle inner tubes, etc.

Terminology Notes

• αH2O in Fe2O3⋅αH2O: Represents "alpha-phase monohydrate", a specific crystalline form of iron(III) oxide hydrate, which is the key structure determining the pigment's red hue and stability.
• Color Index (77491): The "77000 series" in the Color Index denotes inorganic pigments; 77491 specifically classifies iron oxide red, distinguishing it from organic red pigments (e.g., azo-based Pigment Red 170).
• 325-Mesh Wet Sieve Residue: A critical quality indicator for pigments, referring to the proportion of particles retained on a 325-mesh sieve (particle size >44 μm) after wet sieving. A value ≤0.3% ensures good dispersion in coatings, plastics, and other substrates.

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