Purity                              %

99.5-105

99.95

Chloride(Cl)                        %

≤0.002 

＜0.002

Clarity test

≤4

合格

Heavy metals(以Pb计)                %

≤0.001

＜0.0005

Phosphate(PO₄)                       

≤0.002

＜0.002

Ignition residue(SO₄)               %

≤0.01

＜0.01

Calcium(Ca)                         %

≤0.005

0.0026

Iron(Fe)                            %

≤0.0003 

＜0.0003

copper(Cu)                         %

≤0.001

0.0006

acid non-soluble substance          %

≤0.005

0.003