Scandium(III) hydroxide
Scandium(III) hydroxide is an inorganic compound with the chemical formula Sc(OH)3. It is an amphoteric compound.[1] It is slightly soluble in water, and its saturated solution (pH = 7.85) contains Sc(OH)3 and a small amount of Sc(OH)2+. The solubility of scandium(III) hydroxide in water is 0.0279 mol/L. It will convert to ScO(OH) after aging, greatly reducing the solubility (0.0008 mol/L).[2] Scandium(III) hydroxide can be produced by reacting scandium salts and alkali hydroxides.[3] In the reaction, different starting ingredients can generate different intermediates such as Sc(OH)1.75Cl1.25, Sc(OH)2NO3 and Sc(OH)2.32(SO4)0.34.[4]
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| ECHA InfoCard | 100.037.855 |
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| Properties | |
| Sc(OH)3 | |
| Molar mass | 95.98 |
| Density | 2.65 g·cm−3 |
| 0.268 g/100 mL | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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References
- Moeller, Therald.; Kremers, Howard E. (1945). "The Basicity Characteristics of Scandium, Yttrium, and the Rare Earth Elements". Chemical Reviews. 37 (1): 97–159. doi:10.1021/cr60116a003. ISSN 0009-2665.
- Orlov, Yu. F.; Maslov, E. I.; Belkina, E. I. (2013). "Solubilities of metal hydroxides". Russian Journal of Inorganic Chemistry. 58 (11): 1306–1314. doi:10.1134/S0036023613110168. ISSN 0036-0236.
- Vickery, R. C. (1955). "Scandium hydroxide and scandate ions". Journal of the Chemical Society (Resumed): 251. doi:10.1039/jr9550000251. ISSN 0368-1769.
- Mironov, N. N.; Mal'kevich, N. V. Scandium hydroxide formation reaction. Zhurnal Neorganicheskoi Khimii, 1970. 15 (3): 599-601.
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