In the commercially available title compound, C6H12O12·2H2O, the dodeca­hydroxy­cyclo­hexane mol­ecule has an inversion center. The crystal packing is characterized by a strong O-H...O hydrogen bond involving the water mol­ecules, and the dodeca­hydroxy­cyclo­hexane mol­ecules are additionally linked by O-H...O hydrogen bonds of the hydroxyl groups, resulting in the formation of a three-dimensional network.