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| Identifiers | |
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| CAS Number |
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| 3D model (JSmol) | |
| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.038.501 
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| EC Number |
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| Gmelin Reference | 847042 |
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| CompTox Dashboard (EPA) | |
InChI
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SMILES
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| Properties | |
| Chemical formula | Sr(OH)2 |
| 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/cm (anhydrous) 1.90 g/cm (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 cm/mol |
| Structure | |
| Crystal structure | tetragonal (octahydrate) |
| Hazards | |
| NFPA 704 (fire diamond) |
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| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Strontium oxide Strontium peroxide |
| Other cations | Beryllium hydroxide Magnesium hydroxide Calcium hydroxide Barium hydroxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 N verify (what is ?)
Infobox references
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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.
Preparation
Because Sr(OH)2 is slightly soluble in cold 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 soluble 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.
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 chlorine from strontium chloride is undesirable. Strontium hydroxide absorbs carbon dioxide from the air to form strontium carbonate.
Safety
Strontium hydroxide is a severe skin, eye and respiratory irritant. It is harmful if swallowed.
References
- Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
- "Sortierte Liste: pKb-Werte, nach Ordnungszahl sortiert. - Das Periodensystem online" (in German).
- Brauer, Georg (1963). Handbook Of Preparative Inorganic Chemistry. Academic Press. p. 935.
External links
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