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21548-73-2
Ag2S
471600PD
99.999 %
- 100 mesh approx
244-438-2
Class 9
UN3077
PG III
Characteristic
Silver sulfide is the inorganic compound with the formula Ag2S. A dense black solid, it is the only sulfide of silver.
Chemical formula：Ag2S
Molar mass： 247.80 g·mol−1
Appearance： Grayish-black crystal
Odor： Odorless
Density： 7.234 g/cm3 (25 °C) 7.12 g/cm3 (117 °C)
Melting point： 836 °C (1,537 °F; 1,109 K)
Solubility in water：6.21·10−15 g/L (25 °C)
Solubility product (Ksp)：6.31·10−50
Solubility： Soluble in aq. HCN, aq. citric acid with KNO3
Insoluble in acids, alkalies, aqueous ammoniums
Crystal structure：Cubic, cI8 (α-form) Monoclinic, mP12 (β-form) Cubic, cF12 (γ-form)
Application
It is useful as a photosensitizer in photography. It constitutes the tarnish that forms over time on silverware and other silver objects.
Characteristic
Silver sulfide is the inorganic compound with the formula Ag2S. A dense black solid, it is the only sulfide of silver.
Chemical formula：Ag2S
Molar mass： 247.80 g·mol−1
Appearance： Grayish-black crystal
Odor： Odorless
Density： 7.234 g/cm3 (25 °C) 7.12 g/cm3 (117 °C)
Melting point： 836 °C (1,537 °F; 1,109 K)
Solubility in water：6.21·10−15 g/L (25 °C)
Solubility product (Ksp)：6.31·10−50
Solubility： Soluble in aq. HCN, aq. citric acid with KNO3
Insoluble in acids, alkalies, aqueous ammoniums
Crystal structure：Cubic, cI8 (α-form) Monoclinic, mP12 (β-form) Cubic, cF12 (γ-form)
Application
It is useful as a photosensitizer in photography. It constitutes the tarnish that forms over time on silverware and other silver objects.
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