... Meantime, it is the catalyst making plant green and important for plant absorption. 3.Product ... Weight]: 25kg/bag. [Properties]: Ferrous sulfate is blue green monoclinic crystal or grain, used in pesticide, pigment, ... contact sunshine ,water and moisture;avoid contact with strong acid,oxidants or poisonous substances. Exposure ... and good quality Ferrous sulphate with ferrisulphas with green vitriol