Lithium sulfate is a white inorganic salt with the formula Li2SO4. It is the lithium salt of sulfuric acid.

Properties 

Chemical formula : Li2SO4

Molar mass : 109.94 g/mol

Appearance :White crystalline solid, hygroscopic

Density : 2.221 g/cm3 (anhydrous);2.06 g/cm3 (monohydrate)

Melting point : 859 °C (1,578 °F; 1,132 K)

Boiling point : 1,377 °C (2,511 °F; 1,650 K)

Solubility in water : (monohydrate) 34.9 g/100 mL (25 °C);29.2 g/100 mL (100 °C)

Solubility : insoluble in absolute ethanol, acetone and pyridine

Uses

Lithium sulfate is used to treat bipolar disorder

Lithium-ion batteries

Organic chemistry synthesis