AMMONIUM SULFATE
|
SPECIFICATION |
PHARMACUTICAL GRADE |
INDUSTRIAL |
GRADE |
|
|
|
|
|
|
|
|
First-rate |
Middlings |
|
Appearance |
White crystals |
White or Light crystals |
|
|
N(solid)content |
≥21.0 |
21.0 |
20.5 |
|
H2O content |
≤0.2 |
0.3 |
1.0 |
|
H2SO4 content |
≤0.03 |
0.05 |
0.20 |
|
Fe content |
≤0.007 |
… |
… |
|
As content |
≤0.0005 |
… |
… |
|
Heavy
|
≤0.005 |
… |
… |
|
metal(Pb)content |
|
|
|
|
Insoluble content |
≤0.01 |
… |
… |
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