... , used in pesticide, pigment, medicine, or reagent of chromatographic analysis [Quality Index]: ItemValuePremium gradeFirst gradeSecond gradeFerrous sulfate (FeSO4.7H2O) ,%≥98.094 ... , leather,washingpowder, livestock feed, pencils. 5.details 6.Package supply low price and good quality Ferrous sulphate with ferrisulphas with green vitriol