1. used for extracting the other copper
2. used as a textile mordant
3. used as agricultural pesticides, fungicides, and for water treatment.
4. As a mordant for cotton and silk; used to produce green and blue pigment;
5.used as insectucude, bactericide for water, antiseptics for wood, catalyst for tannage, electrocopper,
battery. carving and so on ;
6. used in mining industry and as raw materials of other chemicals.