Specification: Effective Chlorine 480-540mg/Tablet, 50Tablets/BottleMain Ingredien: Sodium Dichloroisocyanurate(SDIC)Method of Usage:Function and Effect:Rapidly kill and extinguishes the coli, disease bacillus, fungus gemma and all kinds of microorganism. It is broad spectrum, highly effective, non-toxic, low irritating quality. Effervesces and fast dissolves. Its nature is stable; measurement is accurate, operation simple.Application scope: The well, the river, the pond etc Drinking water disinfection. The field work, the flooding disaster area, tap water disinfection and so on.