... such as red ferric oxide etc. Granule material is good fertilizer, which can effectively improve soil, move moss and ... in pesticide, pigment, medicine, or reagent of chromatographic analysis [Quality Index]: ItemValuePremium gradeFirst gradeSecond gradeFerrous sulfate (FeSO4.7H2O) ,%≥98. ... . 5.details 6.Package supply low price and good quality Ferrous sulphate with ferrisulphas with green vitriol