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Manganese Oxide: The Property Manganese oxide has a chemical formula Mn2O3 with a molecular weight of 157.88. It’s a black cubic crystal having a relative density of 4.50. Manganese dioxide is insoluble with water, acetic and ammonium chlorine solutions, but is soluble with other inorganic acid. In cold hydrochloric Acid, manganese oxide forms a brown solution. This solution is then transformed into a red solution by hot dilute sulfuric and concentrated sulfuric acids. Manganese nitrate and MnO2 are decomposed in hot acid and hot nitric acids. The heat releases oxygen and makes Mn3O4. You can find it in the following forms: –Mn2O3 & –Mn2O3.
Methods for Preparing Manganese OxideThe preparation of -Mn2O3 You can further alter or reduce Mn2O3 by using manganese dioxide, or heat divalent manganese salt at 600 to 800°C. To maintain a constant mass, you can also heat pure MnO2 at 650°C. Manganese nitrate Hexahydrate can be used as a raw materials. It must first be heated to solidify at 190°C, and then crushed to be heat at 650°C. The preparation of -Mn2O3 To make -MnO(OH), 350mL were of a solution with 2.2g of manganese. By heating, the thickening suspension emitting oxygen in dark brown to black color is rapidly boiled. Once the mixture has been boiled for approximately 4 minutes, it is separated and washed with 1.5L boiling water. Then, dry it with phosphorus pentoxide. This was then dried carefully at 250°C with reduced pressure for 3 consecutive days in order to make –Mn2O3. Additionally, you can heat –MnO2 at 500°C under reduced pressure for up to 78 hours in order to make -Mn2O3. Lempotee Tech Co., Ltd. is a professional Manganese Oxide company with more than 12 year experience in chemical product development and research. We can help you find high-quality manganese dioxide. Please contact us to send us an enquiry.