Strontium Dihydrohypophosphite, Sr(H₂PO₂)₂

Strontium Dihydrohypophosphite, Sr(H₂PO₂)₂, is formed by the action of phosphorus on strontium sulphide or on a boiling solution of strontium hydroxide, or by dissolving strontium carbonate in hypo-phosphorous acid. It forms stable anhydrous leaflets, soluble in water but not in alcohol. On heating, it breaks up similarly to the calcium salt into water, phosphoretted hydrogen, and the pyro- and meta-phosphates, the two latter being in the molecular proportions of 3 to 1.