805. Arsenic Triselenide

Nomenclature

CAS number: 1303-36-2
Arsenic selenide (As2Se3); arsenious selenide; arsenous selenide.
As2Se3; mol wt 386.72.
As 38.75%, Se 61.25%.

Description and references

Prepd by melting arsenic and selenium in the correct proportions: Uelsmann, Ueber Selenverbindungen, Gttingen (1860); Ann. 116, 122 (1860); by the action of an arsenic salt on a soln of hydrogen selenide: Moser, Atynsky, Monatsh. Chem. 45, 235 (1925).

Properties

Dark brown solid. d 4.75. mp 260°. Sol in nitric acid, alkali-lye, alkali sulfide solutions; insol in water.