Sodium hydrogen sulfide

Structural formula
General
Surname	Sodium hydrogen sulfide
other names	Sodium sulfhydrate; Sodium hydrosulfide;
Molecular formula	NaHS
Brief description	colorless to yellowish, liquid crystals with a rotten egg smell
External identifiers / databases
EC number	240-778-0
ECHA InfoCard	100.037.056
PubChem	28015
ChemSpider	26058
Wikidata	Q414203
properties
Molar mass	56.06 g mol −1
Physical state	firmly
density	1.79 g cm −3
Melting point	52–54 ° C (monohydrate)
boiling point	350 ° C (anhydrous)
solubility	good in water (500 g l −1 at 22 ° C)
safety instructions
H and P phrases	H: 290-301-314-400
	EUH: 071-031
	P: 273-280-302 + 352-305 + 351 + 338
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Sodium hydrogen sulfide is a sodium salt of hydrogen sulfic acid . It belongs to the group of hydrogen sulfides and has the formula NaHS. The formula notation NaSH is also used in databases and specialist literature.

Manufacturing

In the laboratory, sodium hydrogen sulfide is obtained from anhydrous sodium ethanolate and hydrogen sulfide :

{\ display style \ mathrm {C_ {2} H_ {5} ONa + H_ {2} S \ longrightarrow NaHS + C_ {2} H_ {5} OH}}

properties

Sodium hydrogen sulfide is a white, granular, crystalline, very hygroscopic powder that is very easily soluble in water and moderately soluble in ethanol . It turns yellow when heated in dry air, orange at higher temperatures and melts to a black liquid at around 350 ° C. Pure sodium hydrogen sulfide dissolves in hydrochloric acid with vigorous development of hydrogen sulfide. The compound has a rhombohedral distorted sodium chloride structure.

use

Sodium hydrogen sulfide is used technically in some processes such as:

Precipitation of heavy metals in sewage treatment plants .
In the leather industry to remove hair from pelts.
In paper or pulp production to remove the lignin from the wood chips.

In a variant of the Asinger reaction (a multicomponent reaction), sodium hydrogen sulfide is reacted with an α-haloaldehyde, ammonia and another carbonyl compound ( aldehyde or ketone ) to form 3- thiazolines .

Individual evidence

↑ ^a ^b Entry on sodium hydrogen sulfide. In: Römpp Online . Georg Thieme Verlag, accessed on July 14, 2014.
↑ ^a ^b ^c ^d ^e ^f ^g ^h Entry on sodium hydrogen sulfide in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .
↑ ^a ^b ^c Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 371.
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 91st – 100th, improved and greatly expanded edition. Walter de Gruyter, Berlin 1985, ISBN 3-11-007511-3 , p. 487.
^ Norman N. Greenwood, Alan Earnshaw: Chemistry of the elements , 1st edition, Wiley-VCH, Weinheim 1988, ISBN 3-527-26169-9 . Page 886.
↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Inorganic Compounds, pp. 4-90.
↑ Jürgen Martens, Heribert Offermanns and Paul Scherberich: A simple synthesis of racemic cysteine , Angewandte Chemie 93 (1981) 680; Angewandte Chemie International Edition English 20 (1981) 668.

[roempp-1] Entry on sodium hydrogen sulfide. In: Römpp Online . Georg Thieme Verlag, accessed on July 14, 2014.

[GESTIS-2] ↑ ^a ^b ^c ^d ^e ^f ^g ^h Entry on sodium hydrogen sulfide in the GESTIS substance database of the IFA , accessed on January 10, 2017(JavaScript required) .

[brauer-3] Georg Brauer (ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 371.

[howi-4] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 91st – 100th, improved and greatly expanded edition. Walter de Gruyter, Berlin 1985, ISBN 3-11-007511-3 , p. 487.

[Greenwood/Earnshaw-5] Norman N. Greenwood, Alan Earnshaw: Chemistry of the elements , 1st edition, Wiley-VCH, Weinheim 1988, ISBN 3-527-26169-9 . Page 886.

[CRC90_5_6-6] David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Inorganic Compounds, pp. 4-90.

[Ariëns-7] Jürgen Martens, Heribert Offermanns and Paul Scherberich: A simple synthesis of racemic cysteine , Angewandte Chemie 93 (1981) 680; Angewandte Chemie International Edition English 20 (1981) 668.