Magnesium chloride Magnesium chloride kdorfman Tue, 12/20/2011 - 15:05 Magnesium chloride (MgCl2) 1M MW (hexahydrate) = 203.31 10.166 g/50 mL 20.33 g/100 mL MW of MgCl2: Concentration: Mto make: mLadd: g MgCl2