Manganese oxide

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1) Manganese oxide is a general name for the various oxide forms of manganese: such as manganese oxide (MnO), manganese dioxide (MnO2), manganese sesquioxide (Mn2O3) and manganese tetroxide (Mn3O4).

2) Manganese oxide (MnO) is a bright green powder that can be oxidized to form dark purple to black manganese oxide compounds. It is used in textile printing and in glazes and glass colorants.

Synonyms and Related Terms

manganous oxide; manganese monoxide; manganic oxide; manganese tetroxide; manganese sesquioxide; CI 77727; manganomanganic oxide


  • Toxic.
  • Inhalation or ingestion of manganese can cause a nervous system disorder.
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in acids. Insoluble in water.

Composition MnO, Mn2O3, Mn3O4
CAS 1317-35-7
Melting Point 1650 C
Density 5.45 g/ml

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992