Manganese(II) sulfate is the sulfate salt of manganese, with the formula MnSO4. Although the anhydrous salt is white, its hydrates are pinkish in color.

Properties

Chemical formula : MnSO4

Molar mass : 151.001 g/mol (anhydrous);169.02 g/mol (monohydrate);223.07 g/mol (tetrahydrate);277.11 g/mol (heptahydrate)

Appearance : White solid (anhydrous);Pink crystalline solid (hydrated)

Odor : Odorless

Density : 3.25 g/cm³ (anhydrous);2.95 g/cm³ (monohydrate);2.107 g/cm³ (tetrahydrate)

Melting point : 710 °C (1,310 °F; 983 K) (anhydrous);27 °C (80.6 °F; 300.15 K) (tetrahydrate)

Boiling point : 850 °C (1,560 °F; 1,120 K) (anhydrous)

Solubility in water : 52 g/100 mL (5 °C);70 g/100 mL (7 °C)

Solubility : Soluble in ethanol, methanol ; Insoluble in diethyl ether, toluene

Uses

Manganese sulfate is used as a trace analysis reagent, mordant and paint desiccant.