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Silver Sulfide (Ag2S)-Powder

Silver Sulfide (Ag2S)-Powder

Molecular Formula: Ag2S
Purity: 99.999 %
Products Code: TR471600UN
Specification Model: - 100 mesh approx
Hazardous Class: Class 9
EINECS No.: 244-438-2
UN No.: UN3077
CAS: 21548-73-2
Package Class: PG III
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Silver Sulfide (Ag2S)-Powder introduce:


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)


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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