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Thallium(I) sulfate

Chemical compound
Thallium(I) sulfate or thallous sulfate is the sulfate salt of thallium in the common +1 oxidation state, as indicated by the Roman numeral I. It is often referred to as simply thallium sulfate. Wikipedia
Formula: Tl2SO4
Molar mass: 504.83 g/mol
Melting point: 1,170°F (632°C)
Density: 6.77 g/cm³
Appearance: white prisms or dense white powder
Crystal structure: rhomboid
Solubility in water: 2.70 g/100 mL (0 °C); 4.87 g/100 mL (20 °C); 18.45 g/100 mL (100 °C)