Sodium stannate

Structural formula
General
Surname	Sodium stannate
other names	Disodium tin (IV) oxide; Sodium tinate; Dissecting salt; Tin soda; SODIUM STANNATE ( INCI ) ;
Molecular formula	Na 2 SnO 3 (anhydrate); Na 2 SnO 3 3 H 2 O (trihydrate); Na 2 [Sn (OH) 6 ] (corresponds to the trihydrate);
Brief description	white odorless solid
External identifiers / databases
EC number	235-030-5
ECHA InfoCard	100,031,833
PubChem	25501
ChemSpider	23794
Wikidata	Q27281432
properties
Molar mass	212.67 g mol −1
Physical state	firmly
density	7.3 g cm −3
Melting point	231.9 ° C
boiling point	2260 ° C
Vapor pressure	1.33 hPa at 1492 ° C
solubility	soluble in water; insoluble in ethanol and acetone;
safety instructions
GHS labeling of hazardous substances Caution
H and P phrases	H: 315-319-335
	P: 261-280-305 + 351 + 338-304 + 340-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium stannate is a sodium - salt of stannic acid . It occurs in different species.

Extraction and presentation

Sodium stannate is obtained by dissolving tin (IV) oxide in excess, concentrated sodium hydroxide solution at about 100 ° C , whereby the trihydrate is formed. The direct melting of tin (IV) oxide and sodium hydroxide creates the anhydrate.

{\ displaystyle \ mathrm {SnO_ {2} +2 \ NaOH \ longrightarrow Na_ {2} SnO_ {3} + H_ {2} O}}

Similarly, sodium stannate can be obtained by reacting tin or tin (IV) sulfide with hot sodium hydroxide solution.

{\ displaystyle \ mathrm {Sn + 2 \ NaOH + H_ {2} O \ longrightarrow Na_ {2} SnO_ {3} +2 \ H_ {2}}}

{\ displaystyle \ mathrm {3 \ SnS_ {2} +6 \ NaOH \ longrightarrow Na_ {2} SnO_ {3} +2 \ Na_ {2} SnS_ {3} +3 \ H_ {2} O}}

It is also formed when sodium stannite reacts with atmospheric oxygen.

Effective industrial methods are carried out, for example, by reacting sodium carbonate and tin (IV) oxide from cassiterite at around 850 ° C.

{\ displaystyle \ mathrm {Na_ {2} CO_ {3} + SnO_ {2} \ longrightarrow Na_ {2} SnO_ {3} + CO_ {2}}}

properties

Sodium stannate trihydrate is a colorless crystalline powder (thin, six-sided platelets) that is very easily soluble in water, the solubility of which decreases sharply with increasing temperature. It always contains small amounts of adsorbed sodium hydroxide and is very sensitive to carbon dioxide . It has a rhombohedral crystal structure with the space group R 3 (space group no. 148) (a = 5.84 Å , a = 61.2 °) with a superstructure of the cadmium (II) iodide type. The trihydrate cannot be converted into the anhydrate and decomposes at 140 ° C. Template: room group / 148

use

Sodium stannate is used:

as a gel former
for the production of pure tin , other stannates and tin compounds
as a component of electrolytes for tinning
as coating material (paper)

The mainly used hexahydroxo salt Na ₂ [Sn (OH) ₆ ] is also known as sodium hexahydrostannate, sodium hexahydroxostannate, dissecting salt or priming salt. But it can also be understood as the trihydrate of the simple sodium stannate: Na ₂ SnO ₃ · 3 H ₂ O.

Individual evidence

↑ entry to SODIUM stannates in CosIng database of the European Commission, accessed on 17 April 2020th

↑ ^a ^b ^c ^d data sheet Sodium tin (IV) oxide hydrate from AlfaAesar, accessed on February 4, 2018 ( PDF )(JavaScript required) .

↑ ^a ^b ^c ^d ( page no longer available , search in web archives ) MP Biomedicals

^ ^A ^b William M. Haynes: CRC Handbook of Chemistry and Physics, 94th Edition . CRC Press, 2013, ISBN 978-1-4665-7115-0 , pp. 91 ( limited preview in Google Book search).

↑ ^a ^b Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1771.

↑ Erwin Riedel, Christoph Janiak: Inorganic Chemistry . Walter de Gruyter, 2011, ISBN 978-3-11-022566-2 , p. 552 ( limited preview in Google Book search).

↑ ^a ^b Ananya Ganguly: Fundamentals of Inorganic Chemistry for Competitive Examinations . ISBN 81-317-7622-0 , pp. 9 ( limited preview in Google Book search).

↑ Anil Kumar De: A Text Book of Inorganic Chemistry . New Age International, 2007, ISBN 81-224-1384-6 , pp. 379 ( limited preview in Google Book search).

↑ Yuanbo Zhang, Zijian Su, Bingbing Liu, Zhixiong You, Guang Yang, Guanghui Li, Tao Jiang: Sodium stannate preparation from stannic oxide by a novel soda roasting-leaching process. In: Hydrometallurgy. 146, 2014, p. 82, doi: 10.1016 / j.hydromet.2014.03.008 .

^ Bernard Moody: Comparative Inorganic Chemistry . Elsevier, 2013, ISBN 978-1-4832-8008-0 , pp. 332 ( limited preview in Google Book search).

↑ EChinaChem ( Memento from September 28, 2007 in the Internet Archive )

↑ Hans P. Latscha, Helmut A. Klein: Inorganic Chemistry: Chemistry Basics I . Springer, 2007, ISBN 978-3-540-69863-0 ( page 327 in the Google book search).

↑ Knowledge: Preparatory Salt ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Toter Link / www.wissen.de
↑ Dissecting salt . In: Meyers Großes Konversations-Lexikon . 6th edition. Volume 7, Bibliographisches Institut, Leipzig / Vienna 1907, p. 203 .

[CosIng-1] try to SODIUM stannates in CosIng database of the European Commission, accessed on 17 April 2020th

[alfa-2] ta sheet Sodium tin (IV) oxide hydrate from AlfaAesar, accessed on February 4, 2018 ( PDF )(JavaScript required) .

[mpbio-3] ( page no longer available , search in web archives ) MP Biomedicals@1@ 2Template: Dead Link / www.mpbio.com

[William_M._Haynes-4] A ^b William M. Haynes: CRC Handbook of Chemistry and Physics, 94th Edition . CRC Press, 2013, ISBN 978-1-4665-7115-0 , pp. 91 ( limited preview in Google Book search).

[brauer-5] Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1771.

[Erwin_Riedel,_Christoph_Janiak-6] Erwin Riedel, Christoph Janiak: Inorganic Chemistry . Walter de Gruyter, 2011, ISBN 978-3-11-022566-2 , p. 552 ( limited preview in Google Book search).

[Ananya_Ganguly-7] Ananya Ganguly: Fundamentals of Inorganic Chemistry for Competitive Examinations . ISBN 81-317-7622-0 , pp. 9 ( limited preview in Google Book search).

[Anil_Kumar_De-8] Anil Kumar De: A Text Book of Inorganic Chemistry . New Age International, 2007, ISBN 81-224-1384-6 , pp. 379 ( limited preview in Google Book search).

[DOI10.1016/j.hydromet.2014.03.008-9] Yuanbo Zhang, Zijian Su, Bingbing Liu, Zhixiong You, Guang Yang, Guanghui Li, Tao Jiang: Sodium stannate preparation from stannic oxide by a novel soda roasting-leaching process. In: Hydrometallurgy. 146, 2014, p. 82, doi: 10.1016 / j.hydromet.2014.03.008 .

[Bernard_Moody-10] Bernard Moody: Comparative Inorganic Chemistry . Elsevier, 2013, ISBN 978-1-4832-8008-0 , pp. 332 ( limited preview in Google Book search).

[11] EChinaChem ( Memento from September 28, 2007 in the Internet Archive )

[buch-12] Hans P. Latscha, Helmut A. Klein: Inorganic Chemistry: Chemistry Basics I . Springer, 2007, ISBN 978-3-540-69863-0 ( page 327 in the Google book search).