|
Items
|
value
|
Technical Grade
|
Food Grade
|
|
Main content(as Na3PO4?12H2O)
|
%≥
|
98.0
|
98.0
|
|
Phosphorus Pentoxide(as P2O5)
|
%≥
|
18.3
|
18.3
|
|
Sulfate(as SO4)
|
%≤
|
0.50
|
0.20
|
|
Chloride (as Cl)
|
%≤
|
0.80
|
0.02
|
|
Water insolubles
|
%≤
|
0.10
|
0.10
|
|
Methyl orange alkalinity(as Na2O)
|
|
15.0-19.0
|
15.0-19.0
|
|
Heavy metals(as Pb)
|
%≤
|
|
0.001
|
|
Arsenic (as As)
|
%≤
|
|
0.0003
|
