ferrous sulfate monohydrate FeSO4. H2O: Application: Ferrous sulfate monohydrate is used as a feed supplement to prevent anemia caused by iron deficiencies in the diets of swine, poultry and other animals. The Agricultural, Lawn and Garden, and Turf Management industries use ferrous Sulfate monohydrate to correct iron chlorosis or deficiencies in plants and soils, to eliminate moss, to reduce alkalinity, and as a trace element or micronutrient in fertilizers.the detail is as follows, Formula:FeSO4.H2O Description: off-white or beige powder and granula Specification Fe 30%min Heavy metal(Pb) 0.0007%max As 0.0001%max Cd 0.0001max Packing: IN 25KG PLASTIC WOVEN BAGS.