Ammonium Sulphate
|
Item
|
Standard
|
||
|
Industry grade
|
Agricultural grade
|
||
|
Nitrogen
|
≥21.0%
|
≥21.0%
|
≥20.8%
|
|
Water
|
≤0.2%
|
≤0.5%
|
≤1.0%
|
|
Free acid
|
≤0.03%
|
≤0.08%
|
≤0.2%
|
|
Heavy metal(Basing On Pb)
|
≤0.2%
|
-
|
-
|
|
Fe
|
≤0.007%
|
-
|
-
|
|
As
|
≤0.00005%
|
-
|
-
|
|
Water insoluble
|
≤0.01%
|
-
|
-
|