Disodium tetrasulfide

Structural formula
General
Surname	Disodium tetrasulfide
other names	Sodium tetrasulfide
Molecular formula	Na 2 S 4
Brief description	yellow solid with a rotten egg smell
External identifiers / databases
ECHA InfoCard	100,031,628
PubChem	82835
Wikidata	Q7553379
properties
Molar mass	174.24 g mol −1
Physical state	firmly
density	1.335 g cm −3 (at 15.5 ° C)
Melting point	275 ° C
solubility	soluble in water and ethanol ; practically insoluble in diethyl ether ;
safety instructions
H and P phrases	H: 228-252-302-311-314-400
	P: 210-235 + 410-280-301 + 330 + 331-303 + 361 + 353-305 + 351 + 338-310
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Disodium tetrasulfide is an inorganic chemical compound of sodium from the group of sulfides .

Extraction and presentation

Disodium tetrasulfide can be obtained by reacting sodium sulfide or disodium disulfide with sulfur .

{\ displaystyle {\ ce {Na2S + 3 S -> Na2S4}}}

properties

Disodium tetrasulfide is a solid that smells like rotten eggs and is soluble in water and ethanol. It has a tetragonal crystal structure with the space group I 4 2 d (space group no. 122) . Template: room group / 122

use

Disodium tetrasulfide is used for the reduction of organic nitro compounds, in the preparation of sulfur dyes , in ore flotation employed in the production of metal sulfides and in the manufacture of crosslinking agents such as bis (triethoxysilylpropyl) tetrasulfide. It also serves as a precursor for certain special polymers and is an intermediate product in the electrochemical process of sodium-sulfur accumulators , where it is in liquid form due to the high operating temperature.

Individual evidence

^ ^A ^b Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 394 ( limited preview in Google Book search).
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ data sheet Sodium sulfide, tech., 90 +%, H ₂ O 5% max at AlfaAesar, accessed on February 15, 2019 ( PDF )(JavaScript required) .
↑ Ralf Steudel: Elemental Sulfur and Sulfur-Rich Compounds II . Springer, 2004, ISBN 978-3-540-44951-5 , pp. 131 ( limited preview in Google Book search).
↑ Source: [Disodium tetrasulfide], accessed on February 15, 2019
↑ R. Tegman: The crystal structure of sodium tetrasulphide, Na2S4. In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 29, 1973, p. 1463, doi : 10.1107 / S0567740873004735 .

[Dale_L._Perry-1] A ^b Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 394 ( limited preview in Google Book search).

[Alfa-2] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ data sheet Sodium sulfide, tech., 90 +%, H ₂ O 5% max at AlfaAesar, accessed on February 15, 2019 ( PDF )(JavaScript required) .

[Ralf_Steudel-3] Ralf Steudel: Elemental Sulfur and Sulfur-Rich Compounds II . Springer, 2004, ISBN 978-3-540-44951-5 , pp. 131 ( limited preview in Google Book search).

[Quelle-4] Source: [Disodium tetrasulfide], accessed on February 15, 2019

[DOI10.1107/S0567740873004735-5] R. Tegman: The crystal structure of sodium tetrasulphide, Na2S4. In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 29, 1973, p. 1463, doi : 10.1107 / S0567740873004735 .