Chrome oxide is a durable ceramic paint, this chemical is the only stable metal chromium oxide.
Chrome oxides color is bright green to dark, which is insoluble in acids and alkalis. This green oxide is also insoluble in water and is relatively stable in the air. This oxide is extracted from the mineral Chromite. This crystalline powder is very lightfast and has high coverage. The green color of this oxide is used in various industries. Chrome oxide is commonly used in metal glazes and is used as a pigment.
chrome oxide, also known as chromic oxide (Cr2O3).
Physical and Chemical Properties of Chrome Oxide:
Chrome oxide is a mineral compound with the formula Cr2O3 that contains chromium and oxygen. This mineral compound is in the form of green crystal powder, which has high strength and is resistant to heat and sunlight. It is also insoluble in water and difficult to dissolve in acids.
| Chemical formula | Cr2O3 |
| Molar mass | 151.9904 g/mol |
| Appearance | Light to dark green, powder |
| PH | 5-9 |
| Odor | Odorless |
| Density | 5.22 g/cm3 |
| Melting Point | 2,435 °C (4,415 °F; 2,708 K) |
| Boiling point | 4,000 °C (7,230 °F; 4,270 K) |
| Solubility in water | insoluble |
| Solubility | insoluble in alcohol, acetone, acids |
| Color | Light to dark green |
| Form | crystals |
| Chemical Structure Depiction |  |
The Chemical Formula for Cr2O3:
Chrome oxide is an ionic compound, this chemical must be electrically neutral, meaning that the positive charge of the cation is balanced by the negative charge of the anion.
2×[Cr]3++3×[O]2−→Cr2O3
Production of Chrome Oxide:
In the reaction between sodium dichromate and sulfur at very high temperatures, Chrome oxide is obtained.
Na2Cr2O7 + S → Na2SO4 + Cr2O3
This oxide is also obtained from the decomposition reaction of ammonium dichromate.
(NH4)2Cr2O7 → Cr2O3 + N2 + 4 H2O
This reaction is exothermic.
Chrome Oxide Amphoteric:
Amphoteric depends on the oxidation state of an oxide. Amphoteric oxides can be acidic or alkaline. Chrome oxide is amphoteric that produces hydrated chromium ions when dissolved in acids.
Chrome Oxide Nanoparticles:
Chrome oxide nanoparticles are green metal particles with a high surface area. Nano-scale chrome oxide particles are naturally between 10 and 30 nanometers, and their specific surface area is between 130 and 150 square meters per gram. These nanoparticles are used sparsely in nanofluids. Nanofluids are nanoparticles that are formed in a solution in the presence of surfactants.
Applications and Uses of Chrome Oxide:
In addition to its use as paint in ceramics, chrome oxide is also used in the paint and ink industry, as well as in the glass industry.
Part of the main ink used to print dollars in green chrome oxide. This combination adds color to glass products: An example of this glass is a wine bottle that does not change the taste of wine by protecting it from sunlight.
Chrome oxide is used as a pigment in the paint industry.
This powder composition can be mixed with clay and used in metal glazes.
This green crystalline powder is also used as a catalyst.
Chrome oxide can produce colors such as red, brown, yellow, especially green.
Chrome Oxide Green Pigment:
The green color of this compound is pure Cr2O3, it is the most stable green pigment. Used for painting roof granules, cement, and plaster. It is also used as a good powder for polishing.
Chrome Oxide in Skincare:
This green pigment is used in cosmetic formulations. This combination is approved for cosmetic use such as hair color, nails, and cleansers, but its use is not allowed for lip makeup.
Safety Information:
Inhalation of this green powder stimulates the respiratory system. Prolonged contact with the skin causes ulceration and allergies. The dust of this powder irritates the eyes and Also, this compound is not flammable. If ingested can cause nausea and other problems.
Packing and Storage:
store it in a cool and dry place. Keep the Container closed and protected from physical damage.
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