STRONTIUM HYDROXIDE

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.

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Detailed Description for STRONTIUM HYDROXIDE

Strontium Hydroxide is a clear deliquescent crystals that absorb carbon dioxide from air to form carbonate. It is soluble in hot water and acids, melts at 375 C (anhydrous), loses part of its water at ca. 100 C (octahydrate). It is used in refinery of beet sugar. It is used as a stabilizer in plastic. It is also used to make other strontium compounds.

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 NaOH or KOH, drop by drop to a solution of any strontium salt, most commonly Sr(NO3)2 (strontium nitrate). 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.

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE white or deliquescent crystals
MELTING POINT 375 C
BOILING POINT 710 C
SPECIFIC GRAVITY 3.63
SOLUBILITY IN WATER Soluble in hot water (21.83 g/100ml at 100 C)

SOLVENT SOLUBILITY

Insoluble in acetone, soluble in acid, NH4Cl

pH ca. 13.5 (solution)
VAPOR DENSITY  
AUTOIGNITION

 

NFPA RATINGS Health: 2 Flammability: 0 Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT Not considered to be a fire hazard
STABILITY Stable under ordinary conditions

 

It is used in refinery of beet sugar. It is used as a stabilizer in plastic. It is also used to make other strontium compounds.


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