Urea
Index name |
Industrial Grade |
Agricultural Grade |
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|
Superior |
First-rate |
Qualified |
Superior |
First-rate |
Qualified |
Color |
White color |
White or light color |
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Total nitrogen (N) content (dry basis),% ≥ |
46.5 |
46.3 |
46.3 |
46.4 |
46.2 |
46.0 |
Biuret content,% ≤ |
0.5 |
0.9 |
1.0 |
0.9 |
1.0 |
1.5 |
Content of water (H2O),% ≤ |
0.3 |
0.5 |
0.7 |
0.4 |
0.5 |
1.0 |
Iron content (Fe),% ≤ |
0.0005 |
0.0005 |
0.0010 |
- |
- |
- |
The alkalinity (NH3 meter),% ≤ |
0.01 |
0.02 |
0.03 |
- |
- |
- |
Sulfate content (in SO) 4-2 meter),% ≤ |
0.005 |
0.010 |
0.020 |
- |
- |
- |
Water insoluble matter,% ≤ |
0.005 |
0.010 |
0.040 |
- |
- |
- |
Particle size (φ 0.85-2.80mm),% ≥ |
90 |
90 |
90 |
90 |
90 |
90 |
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