Items	Specifications
	Food grade	Tech grade
Color/Hazen	≤10	≤20
Main content	75.0/81.0/85.0	75.0/81.0/85.0
Arsenic as As	≤0.00005	≤0.005
Fluoride as F	≤0.001
Heavy metal as Pb	≤0.0005	≤0.001
Easily oxidized substances	≤0.012
Sulfuric CID AS so4		≤0.005
Lron as Fe		≤0.002
Chloride as Cl		≤0.0005