ITEM | STANDARD |
Utseende | Vit kristallint pulver |
Assay(%) | 98,0~102,0;pH(5%) |
pH (5 %) | 6.0- 8.0 |
Sulfat, % | ≤ 0,1 |
Magnesium &alkalisalt, % | ≤ 1,0 |
Fluor, ppm | ≤50 |
Arsenik(som AS2O3), ppm | ≤ 2 |
Tungmetaller (som Pb), ppm | ≤ 25 |
Barium | godkänt testet |