CAS number : 1333-82-0
Molecular weight :99.99
Molecular formula/chemical symbol :CrO3
Description :
Red purple powder, encounter ozone formation peroxide. In the formation of hydrogen peroxide chromic acid peroxide. In 250℃down into chromic oxide and oxygen. Soluble in water, alcohol, acid and ethyl ether, soluble in sulfuric acid, alkali and hot potassium bromate solution. System strong oxidizing agents, can oxidation alcohol and other organic matter, and organic matter and flammable substance contact can fire. In alcohol, benzene that can happen combustion or explosion. In plant and animal tissue corrosive, specific gravity 2.7 (crystal), 2.8 (molten material). Freezing point 170-172℃, when melting slightly decomposition, in the 200-150℃decomposition release oxygen, generation between CrO 3 and Cr2O 3 intermediate compound.
USES :
Antioxidant, spectral analysis reagent, determination of carbon and phosphorus, hardening oil and ethylene purification, nitrogen fertilizer production in the gas analysis, metal full phase analysis, plant protection test. Chromium salt manufacturing, etc.
Keywords:Surface treatment chemicals
Report :
|
Test items |
analytically pure(AR) |
chemically pure(CP) |
|
Content (CrO3), or % |
99.0 |
98.0 |
|
Water-insoluble, % or less |
0.003 |
0.01 |
|
Sodium (Na), % acuities |
0.15 |
0.3 |
|
Chloride (Cl), % or less |
0.001 |
0.005 |
|
Sulfate (SO4), % or less |
0.01 |
0.05 |
|
Carbonate (CO3), % |
|
|
|
Ferrum(Fe),% ≤ |
0.01 |
0.02 |
|
Aluminum (Al), % acuities |
0.003 |
0.01 |
|
Potassium (K), % acuities |
0.05 |
0.1 |
