... additive water treatment,etc. Zinc Sulphate HeptahydrateAppearance: White powder.Specification:Industrial gradeZinc sulphate HeptahydratePurity≥98%Zinc(Zn)≥35.5%Water ... lithopone.It is also used in synthetic fiber industry, zinc plating, pesticides, mordant agent of printing and dyeing ... used in trace element fertilizer and feed additive, etc. If you are interested in zinc sulphate mono/hepta,pls send ...