The anhydrous material is hygroscopic, resulting in the hexahydrate when standing in air. The magnesium nitrate occurs naturally only in mines and caverns as nitromagnesite. In the manufacture of concentrated nitric acid, the most common use is as a dehydrating agent. One of the ways to synthesize nitric Acid is to absorption these nitrogen oxides in water. It is a magnesium mineral that is used to make 10.5-0-0+ 9.4% Mg. The absorption is possible by nitrogen abduction in water.
