Arsenic (V) sulfide

General
Surname	Arsenic (V) sulfide
other names	Arsenic pentasulfide; Diarsene pentasulfide;
Molecular formula	As 2 S 5
Brief description	yellow solid
External identifiers / databases
EC number	625-728-1
ECHA InfoCard	100.154.195
PubChem	3371533
Wikidata	Q2983041
properties
Molar mass	310.17 g mol −1
Physical state	firmly
Melting point	> 300 ° C
solubility	almost insoluble in water and acids
safety instructions
H and P phrases	H: 301-331-410
	P: 261-273-301 + 310-311-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Arsenic (V) sulfide is an inorganic chemical compound of arsenic from the group of sulfides .

Extraction and presentation

Arsenic (V) sulfide can be prepared by precipitation from arsenic acid solutions with hydrogen sulfide are obtained, wherein the solution with concentrated hydrochloric acid and the mixture must be cooled with ice.

{\ displaystyle \ mathrm {2 \ H_ {3} AsO_ {4} +5 \ H_ {2} S \ longrightarrow As_ {2} S_ {5} +8 \ H_ {2} O}}

It is also possible to produce it by reacting sodium thioarsenate with hydrochloric acid.

{\ displaystyle \ mathrm {2 \ Na_ {3} AsS_ {4} +6 \ HCl \ longrightarrow As_ {2} S_ {5} +6 \ NaCl + 3 \ H_ {2} S}}

properties

Arsenic (V) sulfide is a lemon yellow, toxic powder that decomposes into arsenic (III) oxide , arsenic (III) sulfide and sulfur when boiled with water . It is insoluble in water and acids, but easily soluble in alkali sulfide solutions with the formation of thioarsenates .

use

Arsenic (V) sulfide is used for the production of glasses with small gold content, which have photoluminescent and conductive properties. It is used as a gas in the production of silver thioarsenate complexes . It was also used as a pigment .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f data sheet Arsenic (V) sulfide, 99.99% from Sigma-Aldrich , accessed on January 1, 2014 ( PDF ).
^ ^A ^b A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 808.
↑ ^a ^b Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 582.
^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 1-4398-1462-7 , pp. 45 ( limited preview in Google Book search).

[Sigma-1] ↑ ^a ^b ^c ^d ^e ^f data sheet Arsenic (V) sulfide, 99.99% from Sigma-Aldrich , accessed on January 1, 2014 ( PDF ).

[Arnold_F._Holleman,_Egon_Wiberg,_Nils_Wiberg-2] A ^b A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 808.

[brauer-3] Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 582.

[Dale_L._Perry-4] Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2011, ISBN 1-4398-1462-7 , pp. 45 ( limited preview in Google Book search).