Synonyms: Montmorillonite Molecular Formula: Al2O3.4(SiO2). H2O EINECS: 215-108-5 Molecular weight: 360.31 CAS No: 1302-78-9 Bentonite that used in foundry, metallurgy, well drilling slurry, food, oil, agriculture, chemical industry, environmental protection, zoology construction, ecological construction, building, paper making, textile, printing & dyeing, ceramic, medicine, cosmetic, machine, etc. Specification: Description: Calcium based Bentonite Major Function: Viscosity Agent Testing specification: Per API spec 13A 600 rpm reading: 30 min Yield Point / Plastic Viscosity ratio: 3 max Filtrate volume, ml 15 max Residue ( 75 micron wt % ): 4.0 max Moisture, wt %: 10 max