Chromium Potassium Sulfate dodecahydrate
- CAS number
- 7788-99-0
- Molecular weight
- 499.40
- Molecular formula / chemical symbol
- CrK(SO4)2.12H2O
Description
Purple-red to black octahedral cubic crystal. Ruby red in transmitted light. Easily weathered. Ruby red in transmitted light, heated to 100 ? C lose some crystal water becomes green too dihydrate 110 ° C, 350 ℃ into anhydrous yellowish green and lose water-soluble. Soluble in water and dilute acids, insoluble in alcohol, can be dissolved in 4 parts of cold water, 2 parts boiling water, almost insoluble in alcohol. Its aqueous solution cold, purple, hot green.
USES
Microscopic analysis with the fixing agent,
leather, preparation of other chromium salts.
Report
|
TEST ITEMS |
TEST RESULT |
|
|
|
(AR) |
(CP) |
|
|
≥99.5 |
99.0 |
|
Water insoluble matter |
≤0.005 |
0.01 |
|
Chloride (Cl) |
≤0.002 |
0.005 |
|
Ammonium salts (NH4) (%) |
≤0.01 |
0.03 |
|
(AL) |
≤0.02 |
0.05 |
|
(Fe) |
≤0.005 |
0.02 |
|
Heavy metals (as Pb) |
≤0.002 |
0.01 |