|
No. |
Item |
Specification |
|
1 |
CaCO3 content (dry basis) |
98.0-100.5 |
|
2 |
Iron (as Fe2O3 ) % ≤ |
0.04 |
|
3 |
Mercury % ≤ |
0.00005 |
|
4 |
Magnesium and alkali salts % ≤ |
1.0 |
|
5 |
Heavy metal % ≤ |
0.002 |
|
6 |
Loss on drying % ≤ |
0.5 |
|
7 |
Identification(carbonate) |
Effervesce with acids,evolving a colorless gas that when passed into Ca(OH)2,produces a white precipitate. |
|
8 |
Identification(calcium salt) |
Moistened with HCL,impact a transient yellowish red color to a nonluminous flame |
|
9 |
Acid insoluble % ≤ |
0.2 |
|
10 |
Fluoride % ≤ |
0.005 |
|
11 |
Arsentic % ≤ |
0.0003 |
|
12 |
Barium |
No green flame |
|
13 |
Lead % ≤ |
0.0003 |
