Manganese(II) Sulfate Monohydrate (MnSO4·H2O)

2015-6-24 11:56:18 Sulfates


Manganese(II) sulfate usually refers to the inorganic compound with the formula MnSO4·(H2O). This pale pink deliquescent solid is a commercially significant manganese(II) salt. Approximately 260 thousand tonnes of manganese(II) sulfate were produced worldwide in 2005. It is the precursor to manganese metal and many other chemical compounds. Mn-deficient soil is remediated with this salt.

Manganese(II) sulfate monohydrate powderManganese(II) sulfate monohydrate granular/prill

Manganese(II) sulfate monohydrate - Free flowing dry powder and granular - Manufactuered and distributed by Uniwin Chemical

Chemical Formula: MnSO4·H2O

IdentificationCAS: 10034-96-5

Physical and Chemical Characteristics (Typical)




Light pink or white Powder

Light pink or white granular or prill

Particle Size

95% passing 80mesh (0.18mm)

5-10mesh (1.7-4mm)

Purity (MnSO4·H2O)

98% min

97.5% min


31.8% min

31.5% min

Insoluble Matters

0.05% max

0.1% max


15ppm max

15ppm max


10ppm max

10ppm max


5ppm max

5ppm max


-          In pp bags with liner, 25kgs net each.

-          In jumbo bags, 1 ton or 1.25 tons net each.

-          Or as customer's requested.




Like many metal sulfates, manganese sulfate forms a variety of hydrates: monohydrate, tetrahydrate, pentahydrate, and heptahydrate. The monohydrate is most common. All of these salts dissolve to give faintly pink solutions of the aquo complex[Mn(H2O)6]2+. The pale pink colour of Mn(II) salts is highly characteristic.

Applications and production

Typically, manganese ores are purified by their conversion to manganese(II) sulfate. Treatment of aqueous solutions of the sulfate with sodium carbonate leads to precipitation of manganese carbonate, which can be calcined to give the oxides MnOx. In the laboratory, manganese sulfate can be made by treating manganese dioxide with sulfur dioxide:

MnO2 + SO2 → MnSOS4


It can also be made by mixing potassium permanganate with sodium hydrogen sulfate and hydrogen peroxide.

Manganese sulfate is a by-product of various industrially significant oxidations that use manganese dioxide, including the manufacture of hydroquinone and anisaldehyde.

Electrolysis of manganese sulfate yields manganese dioxide, which is called EMD for electrolytic manganese dioxide. Alternatively oxidation of manganese sulfate with potassium permanganate yields the so-called chemical manganese dioxide (CMD). These materials, especially EMD, are used in dry-cell batteries.