Specifications :

• Assay (potentiometric) : ≥ 99.0 %
• Solution in water : passes test
• Chloride (Cl) : ≤ 0.005 %
• Sulfate (SO₄) : ≤ 0.005 %
• Cu (Copper) : ≤ 0.001 %
• Fe (Iron) : ≤ 0.001 %
• Mn (Manganese) : ≤ 0.005 %
• Pb (Lead) : ≤ 0.001 %
• Zn (Zinc) : ≤ 0.005 %
• Substances not precipitated by ammonium sulfide (as sulfate) : ≤ 0.2 %