Main Item
|
Superior grade
|
First grade
|
Qualified grade
|
Agriculture grade
|
KNO3 % ≥
|
99.7
|
99.4
|
99.0
|
98.0
|
K2O % ≥
|
46.0
|
46.0
|
46.0
|
46.0
|
Nitrogen % ≥
|
13.5
|
13.5
|
13.5
|
13.5
|
Moisture % ≤
|
0.10
|
0.10
|
0.30
|
0.2
|
Cl % ≤
|
0.01
|
0.02
|
0.10
|
-
|
Water insoluble % ≤
|
0.01
|
0.02
|
0.05
|
-
|
SO42- % ≤
|
0.05
|
0.02
|
-
|
-
|
Moisture rate % ≤
|
0.25
|
0.01
|
-
|
-
|
Fe % ≤
|
0.003
|
0.3
|
-
|
-
|