... heptahydrate 1)FeSO4.7H2O%,98%;Fe,20% 2)package,25kg/bag 3)Usage, additives,fertilizer,water scavenging agent iron sulfate ... scavenging agent,wood preservative,disinfectant and heliograph etc.as fertilizer, herbicide and pesticide in agriculture.as Local astringent and ... %≥91.090.098.0Fe %≥30.018.3620.0Pb %≤0.002-0.002AS %≤0.002-0.0002Fineness (through 180umtest sieve) %≥ 9595-- Iron Sulphate ...