Chromic Oxide Green
Chemical formula: Cr2O3
Molecular weight: 151.99
Appearance: Dark green hexagonal crystal or amorphous olive-green powder with a metallic sheen.
Specific gravity: 5.21 g/cm3,
Mons hardness: 8.5-9,
Melting point: 2266 ± 25℃,
Boiling point: 4000℃.
Insoluble in water or acid. Soluble in hot alkali metal bromate solution. Extremely stable against light, air, high temperature, and corrosive gases. High covering power.
Mainly used in smelting metallic chromium and chromium carbide, producing ceramic, grinding, polishing, coating, printing ink, and other industries.
Composite plastic woven bags with inner film, net weight for each 25 kg.
Store in dry places, and avoid moisture, acid mist, and sunlight.
It is forbidden to store foodstuffs and acid products.
|Cr2O3 Content (%) ≧||99|
|Soluble Chromium (%) ≦||0.03|
|Loss on Ignition at 105℃ (%) ≦||0.30|
|Loss on Ignition at 1000℃ (%) ≦||1|
|Water Soluble Matter (%) ≦||0.4|
|Cr6+ (ppm)||Customized based on customer requirements.|
|Residues (45μm) (%)||Level 1||≦ 0.01|
|Level 2||0.01 – 0.1|
|Level 3||0.1 – 0.5|
|Color tone||Customized based on customer requirements.|
|Relative Tinting Strength||Customized based on customer requirements.|
|Dispersion||Should be better than the negotiated reference pigments (5.2).|
|PH of Aqueous Suspension||The discrepancy of PH value with the negotiated reference pigments should not be greater than 1.|
|Oil Absorption||The value difference should not be greater than 15% of negotiated value.|
|Acid and Alkali Resistance||Color changes should not be greater than that of the negotiated reference pigments (5.2).|
Executive Standard: GB/T20785-2006