Iron oxide red
Iron Oxide Red is a common inorganic pigment with the chemical composition of ferric oxide (Fe₂O₃). It boasts stable physical and chemical properties and is 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 shape.
Stability:
High-temperature resistant (stable below 1200℃), light-resistant, weather-resistant, acid and alkali-resistant.
Water and organic solvent insoluble, non-toxic and environmentally friendly.
Form: Powdered, prepared by either natural minerals (such as hematite) or chemical synthesis.
Preparation Method
Natural Extraction:
Hematite (natural Fe₂O₃) is obtained after crushing, purification, and calcination.
Chemical Synthesis:
Drying 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:
Colorants for concrete, tiles, and wall coatings (such as red brick color).
Paints and Coatings:
Offer durable red for metal anti-rust paint, outdoor coatings.
Plastics and rubbers:
Dyed and enhanced with 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. (Dependent on particle morphology and particle size).
Common Models: 130 (Chinese Standard), PR101 (International Color Index).
Cautionary Notes
Avoid inhalation of dust; wear a protective mask.
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 further details about the application scenario for recommendations.
