NO.

Item

Standard

Result

1

Appearance

White crystal

2

Main content ((NH₄H₂PO₄)        %  ≥

98

99.1

3

Phosphorus pentoxide P₂O₅       %   ≥

60.5

61.1

4

Nitrogen, as N                   %   ≥

11.8

12.13

5

Water insoluble matters           %  ≤

0.3

         0.10

6

Moisture                        %  ≤

0.3

0.10

7.

Sulfate (SO4)                    %  ≤

1.2

0.05

8.

Cadmium(Cd)/%

————

0.00006

9.

Lead Pb/%

————

0.001

10.

Chromium (Cr)/%

————

0.001

11.

Mercury(Hg)/%

————

0.00001

12.

PH of 1% solution

4.0-5.0

4.60

13.

Arsenic as As

———–

0.0005

Chemical Analysis

Typical Values

Guaranteed Percent

1

Total Phosphorus,as P    

24.5%

24.0% min

2

Total Nitrogen, as N        

11.6%

11.0% min

3

Fluorine,as F          

0.16%

0.24% min

4

P/F ratio

153

        100 min

5

Arsenic, as As

1 ppm

75 ppm max

6

Heavy Metals, as Pb

＜1 ppm

30 ppm max

7

Aluminum,as Al

0.34%

8

Cadmium,as Cd

＜15 ppm

9

Calcium,as Ca          

0.1%

10

Copper,as Cu              

＜1 ppm

11

Iron,as Fe

0.4%

12

Magneisum,as Mg

0.8%

13

Manganese,as Mn

50 ppm

14

Potassium,as K

0.25%

15

Sodium,as Na

0.3%

16

Sulfur,as S

1.3%

17

Zinc,as Zn

416 ppm

18

Moisture,as H₂O

＜2.0%