| ≥1 piece |
Food grade of Calcium Carbonate has high CaCO3 content and low impurities, some specifications are superior to those in USP28. In addition some specifications also can be added according to the customer's demanding, such as particle size and bulk density, to meet special requests.
| Test Item | Specification | |
| Characteristic | Clean odorless, fine white powder | |
| 2. A | Identification (Carbonate, CO3 2- ) |
Effervesce with acids, evolving a colorless gas that when passed into Ca(OH) 2 , produces a white precipitate. |
| 2. B | Identification (Calcium salt, Ca 2+ ) |
Moistened with HCL, impact a transient yellowish Red Color to a nonluminous flame |
| 3. | Acid insoluble % ≤ | 0.2 |
| 4. | Loss on drying % ≤ | 0.5 |
| 5. | Barium salt | No green flame |
| 6. | Magnesium and alkali metals % ≤ | 1.0 |
| 7. | Iron % ≤ | 0.04 |
| 8. | Heavy metals % ≤ | 0.002 |
| 9. | Arsenic salt % ≤ | 0.0003 |
| 10. | Fluoride % ≤ | 0.005 |
| 11. | Lead % ≤ | 0.0003 |
| 12. | Mercury % ≤ | 0.00005 |
| 13. | CaCO 3 Content (Dry basis) % | 98.0-100.5 |
| 1 |
Insolubles in hcl |
<0.2% |
| 2. |
Barium salt |
QUALIFIED |
| 3 |
Moisture |
<2% |
| 4 |
Heavy metal |
<0.003% |
| 5 |
calcium carbonate |
>98.5% |
| 6 |
Fe |
<0.04% |
| 7. |
As |
<0.001% |
| 11. |
Brightness |
>95% |