Item
Unit
Index
Purity (base on dry basis)
%
98-102
5% solution Properties
无色透明
PH value of 33.3% aqueous solution
3-4
Sulfate (base on SO42-)
≤0.01
Heavy metal (base on Pb)
PPM
≤20
Arsenic (base on As)
≤2
Loss on drying (120℃, 4h)
≤0.5
Maleic acid
%
≤0.05
Lead
≤10