|
Items
|
value
|
Technical Grade
|
Food grade
|
|
Main content(as Na2HPO4?12H2O
|
%≥
|
98.0
|
98.0
|
|
pH of 1% solution)
|
|
8.8-9.2
|
8.8-9.2
|
|
Sulfate(as SO4)
|
% ≤
|
1.2
|
0.2
|
|
Chloride (as CL)
|
%≤
|
0.05
|
0.02
|
|
Heavy metals (as Pb)
|
%≤
|
|
0.001
|
|
Arsenic (as AS)
|
%≤
|
|
0.0003
|
|
Fluoride (as F)
|
%≤
|
0.10
|
0.005
|
|
Water insolubles
|
%≤
|
0.10
|
0.10
|
