... min. 3.monohydrate FeSO4. H2O: 91% min. Fe: 30% min. ferrous sulfate Types Name of specs.HeptahydrateMonohydrateFeSO4.7H2O, % ≥98-FeSO4.H2O,% ≥-91Fe ... it is for fertilizer, weedicide, pesticide treating wheat smut etc. Ferrous sulphate monohydrate Usage: It is feed additive used as supplement ... in plastic lined plastic woven bag of 25kgs.net each. ferrous sulfate heptahydrate/monohydrate high quality