... ferrous sulphate monohydrate powder 1)FeSO4.H2O%,91%;Fe,30% 2)25kg/bag 3)Use,fertilizers Fertilizer grade ferrous sulphate monohydrate ... iron salts, ink, iron oxide red and indigo-blue;2)as mordant ,tanning agent,water scavenging agent,wood preservative,disinfectant ... monohydrateFerrous sulphate heptahydrateAgro gradeFeed gradeFerrous sulphate%≥91.090.098.0Fe %≥30.018.3620.0Pb %≤0.002-0.002AS %≤0.002- ...