Specifications
Dark red crystal, specific gravity 2.67-2.82, melting point 196 degrees celsius, soluble in water and ether, easily deliquescenc
Chromic anhydride
Other name: chromic acid
Chemical formula: CrO3
Cas no.: 1333-82-0
Melting point: 197 centigrade degree
Appearance: dark purplish-red flake
Spec:
Standard : GB/T1610-1999
|
Item
|
Excellence grade
|
First grade
|
Passed grade
|
|
CrO3 ≥
|
99.7
|
99.5
|
99
|
|
Water insoluble ≤
|
0.02
|
0.03
|
0.10
|
|
Sulfate ( SO4) ≤
|
0.06
|
0.15
|
0.30
|
|
Na+ ≤
|
0.05
|
--------
|
------
|
|
Cl ≤
|
0.05
|
|
|
|
Fe ≤
|
0.05
|
|
|
Usage: mainly used in electroplating, electrolytic refining high-purity chromium metal, used organic dyes, synthetic rubber, oil refining catalyst industry