Component

Range

Typical

Main content

99.0%min

         99.2%

Phosphoric ( P2O5 )

51.3%min

         52%

Potassium-as K2O

33.8%min

         34%

Moisture

0.2%max

         0.2%

Insoluble

0.1%max

         0.1%

PH value

4.4-4.8

         4.6

As

0.0003%max

         0.0003

Pb

0.001%max

         0.0008

F

0.002%max

         0.002%

Test Standard

GB/T 1274-1993