Iron oxide red
Iron Oxide Red is a common inorganic pigment, chemically composed of iron(III) oxide (Fe₂O₃), with stable physical and chemical properties, widely used in construction, coatings, ceramics, plastics, and rubber industries.
Basic Features
Chemical Formula: Fe₂O₃ (Iron(III) oxide).
Color: Typically reddish-brown or brick red, there may be slight variations due to particle size and crystal type.
Stability:
High-temperature resistant (stable below 1200°C), light-fast, weather-resistant, acid and alkali-resistant.
Insoluble in water and organic solvents, non-toxic and environmentally friendly.
Form: Powder, available through natural mineral processing (e.g., hematite) or chemical synthesis.
Preparation Method
Natural Extraction:
Hematite (natural Fe₂O₃) is obtained after crushing, purification, and calcination.
Chemical Synthesis:
Dry Process: Iron salts (such as ferric sulfate) are directly decomposed at high temperatures.
Bayer process: Recovery and utilization of steel pickling waste for preparation.
Primary Applications
Building Materials:
Concrete, tiles, and wall paint coloring agents (such as brick red).
Paints and Coatings:
Offer durable red for metal rust-proof paint, outdoor coatings.
Plastics and Rubber:
Enhanced with color and UV stability.
Ceramics and Glass:
Red or brown pigments in the glaze.
Other Applications:
Cosmetics (such as eyeshadow), polish, magnetic materials, etc.
Categories and Models
By purity: Industrial grade (90-95%), Pigment grade (96%+), High purity grade (99%+).
By hue: Yellowish red, Bluish red, etc. (depending on particle morphology and particle size).
Common Models: 130 (Chinese Standard), PR101 (International Color Index).
Important Notes
Avoid inhalation of dust; wear a protective mask.
Store in a dry environment to prevent caking.
Iron oxide red is an ideal choice as a substitute for organic red pigments due to its low cost, high stability, and safety. For more specific parameters (such as particle size, color difference), please provide further details about the application scenario for a recommendation.
