Item Specification Result Purity98.0% 101.0% 99.16% Sulfate500ppm489ppm PH Value 100G/L 5.5 5.76.8 Arsenic AS1ppm <1ppm Heavy Metal(as Pb) 10ppm<10ppm Selenium30ppm<20ppm Cyclohexylamine25ppm <25ppm Dicyclohexylamine1ppm Pass Transparency >95%96.50% Sulphamic Acid 0.15%<0.15% Absorbency 100G/L 0.10 0.1