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Sodium stannate

Sodium stannate
White powder of sodium stannate
Names
IUPAC name
disodium hexahydroxyltin
Other names
Sodium stannate(IV)
Identifiers
12027-70-2
ECHA InfoCard 100.031.554
Properties
H6Na2O6Sn
Molar mass 266.73 g/mol
Appearance Colorless or white solid
Density 4.68 g/cm3
Boiling point N/A
Hazards
Safety data sheet [1]
H300 + H310 + H330 + H410
T+
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point 57 °C (135 °F; 330 K)
N/A
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 2132 mg/kg [Mouse]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Sodium stannite is the inorganic compound with the formula Na2Sn(OH)6. This colourless salt forms upon dissolving tin or tin dioxide in sodium hydroxide. Sodium stannite is used as a stabiliser for hydrogen peroxide.

Alkali metal stannite compounds are prepared by dissolving tin in sodium hydroxide:

A similar reaction occurs when tin dioxide is dissolved in base:

The anion is octahedral as are most stannates, e.g., the hexachlorostannate anion [SnCl6]2−. The Sn-O distances average 2.071 Å. In some old literature, stannates are sometimes represented as the simple oxyanion SnO32−.


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