Assay 99.0～100.5% （T）
pH 1.5～2.0
Specific rotation[a]D20 +5.5°～+7.0°，c = 8 in 6 N HCl
(Transmittance T430) ≥98.0%
Chloride(Cl) 19.89～20.29%
Ammonium(NH4) ≤0.02%
Sulfate(SO4) ≤0.020%
Iron(Fe) ≤10ppm
Heavy metals(Pb) ≤10ppm
Arsenic(As2o3) ≤ 1ppm
Loss on drying 8.5～12.0%
Residue on ignition ≤0.10%
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