Arsenic Triselenide
Title: Arsenic Triselenide
CAS Registry Number: 1303-36-2
Additional Names: Arsenious selenide; arsenous selenide
Molecular Formula: As2Se3
Molecular Weight: 386.72
Percent Composition: As 38.75%, Se 61.25%
Literature References: Prepd by melting arsenic and selenium in the correct proportions: Uelsmann, Ueber Selenverbindungen, Göttingen (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.
Melting point: mp 260°
Density: d 4.75

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