Description ferrous sulphate a substance known as heptahydrate salt utilizing the composition feso4 7h2oIt serves as used as fertilizer and coagulant. Ferrous sulphate is crafted in 2 forms, Monohydrate and hyptahydrate. The difference between the products is the degree of drying it underwent. Monohydrate has been dried further than hyptahydrate, And is freer flowing. Ferrous sulphate manufacturer formula feso4 7h2o molar mass 278. 02 g/mol melting point 60, 64 c iupac id iron ii sulfate density 1. 895 g/cm ability to dissolve in water 29. 51 g/100 ml 25 c application medical use colorant ink fertilizers agriculture content information particular limits result assay titr. 90, 95. 00 % 94. 5% appearance greenish crystals passes test fe 19. 00%,, 1% 19. 3% ph of 10% solution 2, 4 3. 2 water insoluble matters max 0. 5% 0. 2%