Silver Selenide (Ag2Se)-Powder

Characteristic：

Silver selenide (Ag₂Se) is the reaction product formed when selenium toning analog silver gelatine photo papers in photographic print toning. The selenium toner contains sodium selenite (Na₂SeO₃) as one of its active ingredients, which is the source of the selenide (Se²⁻) anion combining with the silver in the toning process.

Chemical formula：Ag₂Se

Molar mass：294.7 g/mol

Density：8.216 g/cm3, solid

Melting point：896.85 °C (1,646.33 °F; 1,170.00 K)

Solubility in water：insoluble

Ag2Se.pdf