Strontium hydroxide octahydrate (Sr(OH)2•8H2O)-Crystal introduce:
Strontium hydroxide, Sr(OH)2, is a caustic alkali composed of one strontium ion and two hydroxide ions. It is synthesized by combining a strontium salt with a strong base. Sr(OH)2 exists in anhydrous, monohydrate, or octahydrate form.
Molar mass:121.63 g/mol (anhydrous);139.65 g/mol (monohydrate); 265.76 g/mol (octahydrate)
Appearance:prismatic colourless crystals;deliquescent
Density:3.625 g/cm3 (anhydrous)
1.90 g/cm3 (octahydrate)
Melting point:535 °C (995 °F; 808 K) (anhydrous, 375K for octahydrate)
Boiling point:710 °C (1,310 °F; 983 K) decomposes (anhydrous)
Solubility in water:0.41 g/100 mL (0 °C);1.77 g/100 mL (40 °C);21.83 g/100 mL (100 °C)
Solubility:insoluble in acetone;soluble in acid, NH4Cl
Basicity (pKb):0.3 (first OH–), 0.83 (second OH–)
Magnetic susceptibility (χ):−40.0·10−6 cm3/mol
Crystal structure:tetragonal (octahydrate)
Strontium hydroxide octahydrate is used in the sugar industry for its purification, oil and paint industry to improve its drying properties and as an active ingredient in depilatory hair removal products. It is also used as a raw material for manufacturing of other products of strontium salts.
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