Potassium hydrogen sulfide

Structural formula
General
Surname	Potassium hydrogen sulfide
other names	Potassium bisulfide
Molecular formula	KHS
Brief description	colorless solid
External identifiers / databases
CAS number 1310-61-8 EC number 215-182-9 ECHA InfoCard 100.013.803 PubChem 102109 Wikidata Q3270519
properties
Molar mass	72.17 g mol −1
Physical state	firmly
density	1.70 g cm −3 (hemihydrate) 1.69 g cm −3
Melting point	450-510 ° C
solubility	easily in water
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Potassium hydrogen sulfide is an inorganic chemical compound of potassium from the group of hydrogen sulfides .

Extraction and presentation

Potassium hydrogen sulfide can be obtained by reacting potassium amide with hydrogen sulfide in ammonia as a solvent .

It can also be obtained by saturating a potassium hydroxide solution with hydrogen sulfide .

${\displaystyle \mathrm {KOH+H_{2}S\longrightarrow KHS+H_{2}O} }$

properties

Potassium hydrogen sulfide is a colorless, highly hygroscopic, deliquescent solid that is easily soluble in water. It quickly turns yellow in air with the formation of polysulphides and hydrogen sulphide . It normally occurs as a hemihydrate , which releases its crystal water at 175–200 ° C. When it melts, it forms a dark red liquid.

use

Potassium hydrogen sulfide is used in organic chemistry to make thiols .

Individual evidence

1. ↑ ^{a b c d e f} Entry on potassium hydrogen sulfide in the GESTIS substance database of the IFA , accessed on February 27, 2017(JavaScript required) .
2. ^ William M. Haynes: CRC Handbook of Chemistry and Physics, 95th Edition . CRC Press, 2015, ISBN 978-1-4822-0868-9 , pp. 82 ( limited preview in Google Book search).
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
4. ↑ H. Jacobs, C. Erten: About potassium hydrogen sulfide, KHS. In: Journal of Inorganic and General Chemistry. 473, 1981, p. 125, doi: 10.1002 / zaac.19814730214 .
5. ↑ Entry on potassium sulfides. In: Römpp Online . Georg Thieme Verlag, accessed on March 1, 2015.
6. ↑ Joachim Buddrus, Bernd Schmidt: Fundamentals of organic chemistry . Walter de Gruyter GmbH & Co KG, 2015, ISBN 978-3-11-033105-9 , p. 352 ( limited preview in Google Book search).