... 50 lb paper bags.7. Payment: T/T, L/C,D/P and so on.8. Specificaton: ITEMZnSO4 • H2OZnSO4 • 7H2OGranulesPurity, %≥989898 ... the processing, this process is called water quality stability, zinc sulfate in this used for water quality stabilizer. The application of ... do basic fertilizer, hairy, fertilizer, etc. Catkin Best-selling Zinc Sulfate 98%