Nomenclature
CAS number: 1303-33-9
Arsenic sulfide (As
2S
3); yellow arsenic sulfide; orpiment; auripigment; arsenic yellow; king's yellow; king's gold.
As
2S
3; mol wt 246.04.
As 60.90%, S 39.10%.
Description and references
The article of commerce contains much less
sulfur than theory. Prepn: Gmelins, Arsenic (8th ed.) 17, pp 422-433 (1952).
Properties
Yellow or orange powder. mp
reported from 300 to 325°. d 3.46. Practically insol
in water. Sol in alkalies, alkali sulfides or carbonates; slowly
sol in hot HCl; dec by HNO3.Use
Manuf of glass, particularly infrared-transmitting
glass; manuf of oil cloth, linoleum; in electrical semiconductors,
photoconductors; as pigment; for depilating hides; in pyrotechnics.