Specification | GB 1886.334-2023 | FCC VII | |
Content ( Dry Basis ) , w % ≥ | 98 | 98 | |
As), mg / Kg ≤ | 3 | 3 | |
Fluoride, mg / Kg ≤ | 10 | 10 | |
Heavy Metals (Pb), mg / Kg ≤ | 10 | ---- | |
Insoluble Substances , w % ≤ | 0.2 | 0.2 | |
Lead (Pb), mg / Kg ≤ | 2 | 2 | |
Loss on drying, w % | Anhydrous ≤ | 2.0 | 2.0 |
Trihydrate | 20.0-30.0 | ---- | |
pH Value (10g/L) | 9.0±0.4 | ---- |