Strontium hydroxide
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| Strontium hydroxide | |
|---|---|
| Identifiers | |
| CAS number | [18480-07-4] (anhydrous) |
| Properties | |
| Molecular formula | Sr(OH)2 |
| Molar mass | 121.63468 g·mol–1 (anhydrous) 139.64996 g·mol–1 (monohydrate) 265.75692 g·mol–1 (octahydrate) |
| Appearance | prismatic colourless crystals |
| Melting point |
375°C (anhydrous) |
| Solubility in water | 1.77 g / 100 mL at 20 °C |
| Basicity (pKb) | –2.19 |
| Hazards | |
| EU classification | Harmful (Xn) |
| R-phrases | R22 R36 R37 R38 |
| Related Compounds | |
| Other anions | Strontium oxide Strontium peroxide |
| Other cations | Calcium hydroxide Barium hydroxide |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references | |
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.
Contents |
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 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.[1]
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
- ↑ Brauer, Georg (1963). Handbook Of Preparative Inorganic Chemistry. Academic Press, pp 935.
External links
- European Chemicals Bureau
- http://www.chemicalland21.com/industrialchem/inorganic/STRONTIUM%20HYDROXIDE.htmde:Strontiumhydroxid
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
