Specification: Chemical Formula: ZnSO4H2O Appearance: White powder Assay (as ZnSO4H2O): ≥98.0% Zinc: ≥35.5% Lead (as Pb): ≤ 10 ppm Arsenic (as As): ≤5 ppm . Cadmium (as Cd): ≤ 5 ppm Package: Net weight 25/50kgs plastic woven bags. Shelf life: One year in dry conditions after production. Application: piglet, swine, poultry, lamb, calf