Title: Arsenic Pentasulfide
CAS Registry Number: 1303-34-0
Additional Names: Diarsenic pentasulfide
Molecular Formula: As2S5
Molecular Weight: 310.17
Percent Composition: As 48.31%, S 51.69%
Literature References: Prepd from H3AsO4 and H2S: Schenk in Handbook of Preparative Inorganic Chemistry vol 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p 603.
Properties: Brownish-yellow, glassy, amorphous, highly refractive mass. Insol in water; sol in alkalies and alkali sulfides. Dec into As2O3, S, and As2S3 when boiled with water.
Use: In thin sheets as a light filter; in pigments.