Item |
High-class product |
First-class product |
Ammonium fluoroborate (NH4BF4), % ≥ |
98 |
97 |
PH value of aqueous solution (1% solution) |
3.5-5 |
3.5-5 |
Water solubility test |
pass |
pass |
Chloride (Cl-), % ≤ |
0.005 |
|
Sulfate (SO42-), % ≤ |
0.005 |
0.01 |
Phosphate (PO43-), % ≤ |
0.005 |
|
Silicate (base on SiO2), % ≤ |
0.01 |
0.8 |
Iron (Fe), % ≤ |
0.005 |
0.1 |
Heavy metal (base on Pb), % ≤ |
0.003 |
0.003 |