... textile mordant, agricultural pesticides, fungicides, and for water treatment. As a mordant for cotton and silk; used to produce green ... and blue pigment; used as insectucude, bactericide for water, antiseptics for wood, catalyst for tannage, electrocopper, battery. carving and so on ... on the shipment cost,they're professional. Factory Price Copper Sulphate Pentahydrate 98% ISO Manufacturer