Manganese Chloride (MnCl2)-Crystalline

Characteristic

Manganese(II) chloride is the dichloride salt of manganese, MnCl₂. This inorganic chemical exists in the anhydrous form, as well as the dihydrate (MnCl₂·2H2O) and tetrahydrate MnCl₂·4H₂O), with the tetrahydrate being the most common form.

Chemical formula：MnCl₂

Molar mass：125.844 g/mol (anhydrous);161.874 g/mol (dihydrate);197.91 g/mol (tetrahydrate)

Appearance：pink solid (tetrahydrate)

Density：2.977 g/cm³ (anhydrous);2.27 g/cm³ (dihydrate);2.01 g/cm³ (tetrahydrate)

Melting point：654 °C (1,209 °F; 927 K) (anhydrous);dihydrate dehydrates at 135 °C

tetrahydrate dehydrates at 58 °C

Boiling point：1,225 °C (2,237 °F; 1,498 K)

Solubility in water：63.4 g/100 ml (0 °C);73.9 g/100 ml (20 °C);88.5 g/100 ml (40 °C);123.8 g/100 ml (100 °C)

Solubility：slightly soluble in pyridine,soluble in ethanol;insoluble in ether

Magnetic susceptibility (χ):+14,350·10⁻⁶ cm³/mol

Application

Manganese(II) chloride, plays an important role in the production of dry cell batteries. It is also used as a starting material to the methylcyclopentadienyl manganese tricarbonyl, which has antiknock property. Further, it is used in the formation of an active Manganese(0) species useful for radical cyclization. It is also used in 31P-NMR to determine the size and lamellarity of phospholipidvesicles reactions.