... .Shelf Life: one yearUse:used in feed, preserves, waste water treatmentand water purity, disinfection, rubber, leather,washingpowder, livestock feed, pencils. ... China for 10 years,Has a wealth of experience.Our factory location are closely connected with JINGGUANG railroad and JINGZHU ... make our products has comprehensive competition. 6.Packing goods factory supply water treatment of ferrous sulphate