Tech. Grade Appearance :Colorless, transparent syrupy liquid or in very light color Colour ≤ :30 Assay (asH3 PO4)% ≥ :85.0 Chloride(asCl-) % ≤ :0.0005 Sulphats(as SO4 2- )% ≤:0.003 Iron (Fe)% ≤ :0.002 Arsenic (As)% ≤ :0.005 Heavy metals(as Pb)% ≤:0.001 Food Grade Appearance :Colorless, transparent syrupy liquid or in very light color Colour ≤ 20 Assay (asH3 PO4)% ≥ 85.0 Chloride(asCl-) % ≤ 0.0005 Sulphats(as SO4 2- )% ≤ 0.005 Iron (Fe)% ≤ Arsenic (As)% ≤ 0.00005 Heavy metals(as Pb)% ≤ 0.001 Oxidable matter (as H3 PO4 )% ≤ 0.012 Fluoride (as F)% ≤ 0.001 You are welcome to send me your inquiry any time.