Magnesium Chloride Hexahydrate (Flakes) 500g AR   Magnesium Chloride Hexahydrate Flakes, Lab Grade, 500 grams. The lab grade is used for laboratory research and analysis Catalog Number: IS22098 CAS # 7791-18-6 Chemical Formula: MgCl2•6H2O Country of Origin: CN Harmonization code: 2827.31.00.00 DOT Description: Non Regulated Molecular weight: 203.31