Sodium stannate
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| Sodium stannate | ||
|---|---|---|
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| IUPAC name disodium hexahydroxyltin | ||
| Other names Sodium stannate(IV) | ||
| Identifiers | ||
| CAS number | 12027-70-2 | |
| Properties | ||
| Molecular formula | H6Na2O6Sn | |
| Molar mass | 266.73 g/mol | |
| Appearance | Colorless or white solid | |
| Density | 4.68 g/cm3 | |
| Boiling point | N/A | |
| Hazards | ||
| MSDS | [1] | |
| EU classification | T+, | |
| NFPA 704 |
 0
2
0
| |
| Flash point | 57°C | |
| Autoignition temperature | N/A | |
| LD50 | 2132 mg/kg [Mouse] | |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | ||
| Infobox references | ||
Sodium stannate is the inorganic compound with the formula Na2Sn(OH)6. This colourless salt forms upon dissolving tin or tin dioxide in sodium hydroxide. Sodium stannate is used as a stabiliser for hydrogen peroxide.[2]
Alkali metal stannate compounds are prepared by dissolving tin in sodium hydroxide:[3]
- Sn + 2 NaOH + 4 H2O → Na2[Sn(OH)6] + 2 H2
A similar reaction occurs when tin dioxide is dissolved in base:
- SnO2 + 2 NaOH + 2 H2O → Na2[Sn(OH)6]
The anion is octahedral as are most stannates, e.g., the hexachlorostannate anion [SnCl6]2-. The Sn-O distances average 2.071 Å.[4] In some old literature, stannates are sometimes represented as the simiple oxyanion SnO32-.
References
- ↑ "Sodium stannate trihydrate MSDS". Science Lab. Retrieved 13 November 2012.
- ↑ Clark, John D. (1972). Ignition! An Informal History of Liquid Rocket Propellants. New Brunswick, New Jersey: Rutgers University Press. ISBN 0-8135-0725-1.
- ↑ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
- ↑ Herbert Jacobs Rainer Stahl "Neubestimmung der Kristallstrukturen der Hexahydroxometallate Na2Sn(OH)6, K2Sn(OH)6 und K2Pb(OH)6" Zeitschrift für anorganische und allgemeine Chemie 2000, Volume 626, pages 1863–1866. doi:10.1002/1521-3749(200009)626:9<1863::AID-ZAAC1863>3.0.CO;2-M
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