Iron oxide red
Iron Oxide Red is a common inorganic pigment, chemically composed ofIron(III) oxide (Fe₂O₃)It possesses stable physical and chemical properties and is widely used in construction, coatings, ceramics, plastics, and rubber industries.
Basic Features
Chemical FormulaFe₂O₃ (Iron(III) oxide)
ColorTypically a reddish-brown or brick red, there may be slight variations due to differences in particle size and crystal form.
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.
ShapePowdery in nature, can be prepared by natural minerals (such as hematite) or chemical synthesis.
Preparation Method
Natural Extraction：
Hematite (natural Fe₂O₃) is obtained after crushing, purification, and calcination.
Chemical Synthesis：
Dry ProcessIron salts (such as ferric sulfate) decompose directly at high temperatures.
Bayer processSteel pickling sludge recycling and utilization for preparation.
Main Applications
Building Materials：
Colorants for concrete, tiles, and wall coatings (such as red brick color).
Paints and Coatings：
Offer durable red for metal rust-proof paint and outdoor coatings.
Plastics and Rubbers：
Colorant and UV stabilization enhanced.
Ceramics and Glass：
Red or brown pigments in the glaze.
Other Applications：
Cosmetics (such as eyeshadow), polish agents, magnetic materials, etc.
Categories and Models
By purityIndustrial Grade (90-95%), Pigment Grade (96%+), High Purity Grade (99%+).
By hueYellowish red, bluish red, etc. (depending on particle morphology and particle size).
Common Models: 130 (Chinese Standard), PR101 (International Pigment Index).
Cautionary Notes
Avoid inhalation of dust; protective masks are required.
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 recommendations.
