Specifications
Parameters |
Unit |
Grade I |
Grade II |
Appearance |
/ |
White or colorless crystal powder |
|
Main contents |
≥% |
98.0 |
98.0 |
Total nitrogen( N) |
≥% |
20.8 |
20.8 |
Phosphorus pentoxide,as P₂O₅ |
≥% |
53.0 |
53.0 |
pH |
10G/L |
7.8-8.2 |
7.8-8.2 |
Moisture |
≤% |
0.2 |
0.2 |
Heavy metals, as Pb |
≤% |
0.005 |
0.001 |
Arsenic, as As |
≤% |
0.005 |
0.0003 |
Flouride,as F |
≤% |
0.2 |
0.001 |
Water insoluble |
≤% |
0.1 |
0.1 |
Solubility( at 22℃) |
g/L |
660.0 |
|
EC(1g/L 20℃) |
mS/cm |
1.67 |
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