Chromium oxide
Properties
Chemical formula: Cr₂O₃
Name: Chromium(III) oxide / chromium oxide / chromium oxide green
CAS No.: 1308-38-9
Molar mass: 151.99 g/mol
Density: 5.22 g/cm³
Melting point: approx. 2435 °C
Boiling point: approx. 4000 °C
Mohs hardness: approx. 8-8.5
Color: olive green to dark green
Form: fine powder
Chromium(III) oxide (Cr₂O₃), also known as chromium oxide or chromium oxide green, is an inorganic metal oxide and the most stable oxide of chromium. It is typically supplied as a fine, odorless powder with a characteristic olive-green to dark-green color and offers exceptionally high thermal stability.
Cr₂O₃ crystallizes in a corundum structure of the α-Al₂O₃ type, giving the material a high Mohs hardness of approximately 8-8.5. Chromium oxide is insoluble in water and alcohols and is characterized by high chemical inertness.
One of the most important properties of chromium oxide is its excellent resistance to light, weathering, elevated temperatures and UV radiation. Its stable green coloration makes it an important inorganic pigment for construction materials, coatings, plastics and ceramics.
Its high hardness and corundum structure also make Cr₂O₃ suitable as an abrasive, lapping and polishing material for stainless steel, specialty metals, optical glass and gemstones.
Chromium oxide is additionally used in refractory ceramics, metallurgy, catalytic systems and wear-resistant coatings. It can serve as a component of refractory materials, as a catalyst or catalyst support and as a feedstock for thermally sprayed HVOF protective coatings.
The element chromium and its compounds are widely used in metallurgy, protective coatings, pigments, ceramics and catalyst technology. Would you like to buy chromium oxide? Auremo can provide information about available Cr₂O₃ products and delivery conditions. The chromium price, chromium metal price and chromium price per kg primarily refer to metallic chromium, while the chromium oxide price depends on material specifications, quantity and supply conditions.
Advantages
• Excellent pigment and color stability
• High resistance to light, weathering and temperature
• Mohs hardness of approximately 8-8.5
• Excellent abrasive and polishing properties
• High chemical inertness
• Resistance to aggressive industrial environments
• Extremely high thermal stability
• Suitable for wear-resistant and thermal protective coatings
Applications
• Inorganic green pigments
• Architectural paints and coatings
• Coloring of concrete, plastics and ceramics
• Abrasive and polishing materials
• Polishing of stainless steel and specialty metals
• Processing of optical glass and gemstones
• Refractory materials and technical ceramics
• Refractory bricks and crucibles
• Glass and metallurgical industries
• Catalysts and catalyst supports
• HVOF thermal spraying
• Wear-resistant protective coatings
Auremo offers chromium oxide and other specialty materials for industrial applications. If you have any questions about Cr₂O₃, available specifications, product forms or delivery conditions, please contact us directly.
