... montmorillonite belongs to smectite(including calcium,sodium,sodium-calcium,magnesium smectite),made from shelling,dispersing,purifying,grading and special organice ... and the trading of titanium dioxide,Calcium hydroxide,Calcium carbonate,Silicon dioxide,Pulvistalci.etc.We have our own production ... chemical products. Welcome to Shanghai Yuantai Chemical!Thank you Natural Sodium Bentonite Powder