... %,98%;Fe,20% 2)package,25kg/bag 3)Usage, additives,fertilizer,water scavenging agent iron sulfate heptahydrateMolecular Formula: FeSO4·(X) H20 ... ,water scavenging agent,wood preservative,disinfectant and heliograph etc.as fertilizer, herbicide and pesticide in agriculture.as Local astringent and hematinic ...