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Strontium hydroxide, Sr(OH)2, is a caustic composed of one and two ions. It is synthesized by combining a strontium with a . Sr(OH)2 exists in , , or octahydrate form.

Appearance: opaque crystal, soluble in acid and NH4cl solution, slightly soluble in cold water,

Preparation:Because Sr(OH)2 is very slightly soluble in water, its preparation can be easily carried out by the addition of a strong base such as or , drop by drop to a solution of any strontium salt, most commonly Sr(NO3)2 (). The Sr(OH)2 will precipitate out as a fine white powder. From here, the solution is filtered, and the Sr(OH)2 is washed with cold water and dried.

Applications:Strontium hydroxide is used chiefly in the refining of beet sugar and as a stabilizer in plastic. It may be used as a source of strontium ions when the from is undesirable. Strontium hydroxide absorbs from the air to form .

Sr(OH)2.8H2O     90%min

Ca                     0.1%Max

Ba                     0.1%Max

Na                     0.1%Max

Fe                     0.01%Max

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