which is used in developmental biological research. Ammonium storage A commercial company is using a strontium chloride-based artificial solid called AdAmmine as a means to store ammonium at low pressure, mainly for use in NOx emission reduction on Diesel vehicles. They claim that their patented material can also be made from some other salts, but they have chosen strontium chloride for mass production. Earlier company research also considered using the stored ammonium as a means to store synthetic Ammonium fuel under the trademark HydrAmmine and the press name "hydrogen tablet", however, this aspect has not been commercialized. Their processes and materials are patented. Their early experiments used magnesium chloride, and is also mentioned in that article. Soil testing Strontium chloride is used with citric acid in soil testing as an universal extractant of plant nutrients. References External links Chlorides Strontium compounds Alkaline earth metal halides Fluorite crystal structure