... FeSO4. H2O: 91% min. Fe: 30% min ferrous sulphate Types Name of specs.HeptahydrateMonohydrateFeSO4.7H2O, % ≥98-FeSO4.H2O,% ≥-91Fe, % ≥19.730Pb,% ... and indigo-blue, as mordant, tanning, water purification, preservative of wood and disinfectant etc. In agriculture, it is for ... lichen. It also is used as pesticide for prevention of pathological changes of wheat and fruit tree. Meantime, it is the ...