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 fields.
Basic Features
Chemical Formula: Fe₂O₃ (Iron(III) Oxide).
Color: Typically red-brown or brick red, there may be slight variations due to different particle sizes and crystal shapes.
Stability:
High-temperature resistant (stable below 1200℃), lightfast, weather-resistant, acid and alkali resistant.
Not soluble in water or organic solvents, non-toxic and environmentally friendly.
Form: Powdered, prepared either through natural mineral processing (such as 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 liquid for preparation.
Main Applications
Building Materials:
Concrete, tiles, and wall paints with coloring agents (such as brick red).
Paints and Coatings:
Offer durable red for metal rustproof paint and outdoor coatings.
Plastics and rubbers:
Color coated and enhanced UV stability.
Ceramics and Glass:
Red or brown pigments in the glaze.
Other Applications:
Cosmetics (such as eyeshadows), polish, magnetic materials, etc.
Categories & Models
By purity: Industrial Grade (90-95%), Pigment Grade (96%+), High Purity Grade (99%+).
By hue: Yellowish red, Bluish red, etc. (Dependent on particle shape and size.)
Common Models: 130 (Chinese Standard), PR101 (International Color Index).
Cautionary Notes
Avoid inhalation of dust; protective masks must be worn.
Store in a dry environment to prevent caking.
Iron oxide red is an ideal choice for replacing organic red pigments due to its low cost, high stability, and safety. For more specific parameters (such as particle size, color difference), please provide the application scenario for further recommendation.
