Silver(I) sulfate sample.
| IUPAC name
| Other names
|Molar mass||311.799 g/mol|
|Density||5.45 g/cm3 (at 20°C)|
|Melting point||652.2–660 °C (1,206.0–1,220.0 °F; 925.4–933.1 K)|
|Boiling point||1,085 °C (1,985 °F; 1,358 K)|
| 0.57 g/100 mL (0 °C)|
0.69 g/100 mL (10 °C)
0.83 g/100 mL (25 °C)
0.96 g/100 mL (40 °C)
1.33 g/100 mL (100 °C)
|Solubility|| Soluble in conc. sulfuric acid|
Slightly soluble in acetates, acetone, alcohols, amides, aq. acids, diethyl ether
Insoluble in ethanol
|Vapor pressure||~0 mmHg|
Std enthalpy of
|Safety data sheet||ScienceLab|
| Silver nitrate|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Silver sulfate is an ionic compound of silver with the formula Ag2SO4, mainly used in silver plating and as a non-staining substitute to silver nitrate. It is also used in analytical chemistry.
Silver sulfate darkens upon exposure to light, though this process requires many hours.
Silver sulfate is a white solid, extremely poorly soluble in water (0.83 g/100 ml at 25 °C), but soluble in concentrated sulfuric acid. It is quite stable under ordinary conditions of use and storage, though it darkens upon exposure to air or light.
Silver sulfate is sold by various chemical suppliers, though it's not cheap.
Silver sulfate can be prepared by reacting concentrated sulfuric acid with silver nitrate:
- 2 AgNO3 + H2SO4 → Ag2SO4 + 2 HNO3
- Silver plating
Silver sulfate should not be handled without protection, as it will darken when exposed to light.
Silver sulfate should be kept in closed bottles, away from light and air.
Best to recycle it.