Bentonite (Calcium Bentonite&Sodium Bentonite) Molecular Formula: Al2O3.4(SiO2).H2O Molecular Weight: 360.31 ... ( 75 micron wt )≤4.0%Moisture≤10%Properties: Bentonite is used in foundry,Website:http://www.irochemco.com, ... zoology construction, ecological construction, building, paper making and textile. Bentonite also can be used inprinting & dyeing, ceramic, medicine, cosmetic ...