Chromium Potassium Sulfate dodecahydrate
- Số CAS
- 7788-99-0
- Khối lượng phân tử
- 499.40
- Công thức phân tử / ký hiệu hóa học
- CrK(SO4)2.12H2O
Mô tả
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.
ỨNG DỤNG
Microscopic analysis with the fixing agent,
leather, preparation of other chromium salts.
Phiếu kiểm nghiệm
|
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 |