NO.

Item

Standard

Result

1

Main content                       %  ≥

98.0

99

2

Phosphorus pentoxide   P₂O₅         %    ≥

30.2

31.1

3

K₂O               % ≥

40.5

41.5

4

PH value                     

8.8-9.6

9.3

5

Water insoluble     %  ≤

0.25

0.1

6.

Heavy metals,as Pb   %≤

0.005

0.004

7.

Arsenic ,as As            % ≤

0.005

0.003

8.

Chlorides, as Cl     % ≤

0.5

0.38