MANGANESE (II) OXIDE CAS 1344-43-0 MnO

Manganese monoxide appears as a grass green or grayish green cubic crystal powder or octahedral crystal. The relative density is 5.43~5.46. Melting point 1650 ℃. At 3400 ℃, it dissociates and sublimates. Insoluble in water, soluble in acid and ammonium chloride. In a hot concentrated ammonium chloride solution, manganese chloride and ammonia are formed. Heating in air can easily convert into other high valence manganese oxides, such as manganese trioxide, manganese dioxide, manganese trioxide, etc., which are difficult to reduce. At 1200 ℃, they are not reduced by hydrogen gas, but can be reduced by carbon at 1100-1200 ℃. Generate hydrogen gas and manganese dioxide in red hot water vapor. Heat with sulfur to produce sulfur dioxide and sulfur oxides. Melting in inert gas without decomposition.