Calcium polysulfide

Structural formula
	No drawing available
General
Surname	Calcium polysulfide
other names	Lime sulfur liver; Calcium pentasulfide;
Molecular formula	CaS x (x = 2-7)
Brief description	gray to orange solid with a sulphurous odor
External identifiers / databases
EC number	215-709-2
ECHA InfoCard	100.014.281
PubChem	121494065
Wikidata	Q63148089
properties
Molar mass	200.4 g mol −1
Physical state	firmly
boiling point	104.8 ° C
solubility	soluble in water
safety instructions
H and P phrases	H: 319-335-315-400
	EUH: 031
	P: ?
Toxicological data	820 mg kg −1 ( LD 50 , rat , oral )
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Calcium polysulphides are chemical compounds of calcium from the group of sulphides with the composition CaS _x , with x between 2 and 7 and an average composition of CaS ₅ .

Extraction and presentation

Calcium polysulphides are formed when a mixture of calcium oxide and sulfur is heated . By heating powdered, quick lime sulfur powder in a lot of water, the calcium polysulfide formed containing lime sulfur , which was made in 1852 by a French gardener named Grison first time.

It is also possible to display it by boiling calcium hydroxide with sulfur and water, whereby calcium polysulfide and calcium thiosulfate are formed first.

{\ displaystyle {\ ce {3 Ca (OH) 2 + 12 S -> 2 CaS5 + CaS2O3 + 3 H2O}}}

properties

Calcium polysulfide is a gray to orange solid with a sulfur-like odor.

use

Calcium polysulphides are used in the form of sulphurous lime broth as a spray. If you add diluted hydrochloric acid to a calcium polysulphide solution, a milky white suspension of finely divided sulfur in a dilute calcium chloride solution is created, which is used as sulfur milk against skin diseases, among other things.

Individual evidence

↑ ^a ^b ^c ^d Entry on calcium polysulphides. In: Römpp Online . Georg Thieme Verlag, accessed on April 5, 2019.
↑ ^a ^b ^c ^d Entry on calcium polysulphides in the GESTIS substance database of the IFA , accessed on April 6, 2019(JavaScript required) .
↑ ^a ^b ^c Dahlawi, Saad & Siddiqui, Samreen. (2016). Calcium polysulphide, its applications and emerging risk of environmental pollution — a review article. Environmental Science and Pollution Research. 24. doi : 10.1007 / s11356-016-7842-3 .
↑ Entry on calcium polysulphides in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on April 6, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ LM Levchenko, AA Galitskii et al. a .: Development of semi-industrial synthesis of calcium polysulfide solution and determination of the content of sulfide ions in solution. In: Russian Journal of Applied Chemistry. 88, 2015, p. 1403, doi : 10.1134 / S1070427215090049 .
↑ Georg Frerichs, Georg Arends, Heinrich Zörnig: Hager's handbook of pharmaceutical practice, first volume for pharmacists, drug manufacturers, druggists, doctors and medical officials . Springer-Verlag, 2013, ISBN 978-3-642-90728-9 , p. 762 ( limited preview in Google Book search).

[RömppOnline-1] Entry on calcium polysulphides. In: Römpp Online . Georg Thieme Verlag, accessed on April 5, 2019.

[GESTIS-2] Entry on calcium polysulphides in the GESTIS substance database of the IFA , accessed on April 6, 2019(JavaScript required) .

[10.1007/s11356-016-7842-3-3] Dahlawi, Saad & Siddiqui, Samreen. (2016). Calcium polysulphide, its applications and emerging risk of environmental pollution — a review article. Environmental Science and Pollution Research. 24. doi : 10.1007 / s11356-016-7842-3 .

[CLP_100.014.281-4] Entry on calcium polysulphides in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on April 6, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[DOI10.1134/S1070427215090049-5] LM Levchenko, AA Galitskii et al. a .: Development of semi-industrial synthesis of calcium polysulfide solution and determination of the content of sulfide ions in solution. In: Russian Journal of Applied Chemistry. 88, 2015, p. 1403, doi : 10.1134 / S1070427215090049 .

[Georg_Frerichs,_Georg_Arends,_Heinrich_Zörnig-6] Georg Frerichs, Georg Arends, Heinrich Zörnig: Hager's handbook of pharmaceutical practice, first volume for pharmacists, drug manufacturers, druggists, doctors and medical officials . Springer-Verlag, 2013, ISBN 978-3-642-90728-9 , p. 762 ( limited preview in Google Book search).