Appearance:Yellowish Powder Content: 67.5~72.5 Use: 'This product is a kind of strong kill molluscs agentia. it is mainly used for the prevention and control of ampullaria gigas. This product is well known in the world , and it is the best agentia which can be used for Killing oncomelania, prevention and control of schistosomiasis. This product is also can be used in water treatment, in order to interfere with human schistosomiasis transmission medium. The product is field concentration and it is harmless for the plant. This product can also be used to kill adult tapeworm.'