Manganese dioxide

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A dense, black powder that occurs in nature as the mineral Pyrolusite. Manganese dioxide ore is the primary source for manganese metal. Synthetically produced manganese dioxide has a brownish tone. Both natural and synthetic manganese dioxide have been used for paint pigments and as a colorant in mortar. Manganese dioxide is used to make amethyst glass and to counteract the yellowish green color of iron oxide in glass. It is used as a black glaze and for painting on porcelain, faience, and majolica, and as a Drier for oil paints.

Synonyms and Related Terms

manganese black; manganese brown; Pigment Black 14; CI 77728; dióxido de manganeso (Esp.); dioxyde de manganèse (Fr.); dióxido de manganês (Port.); black oxide of manganese; manganese binoxide; battery manganese


  • Toxic.
  • Inhalation or ingestion of manganese can cause a nervous system disorder.
  • Strong oxidizer and should not be heated or rubbed with organic matter.
  • ThermoFisher: SDS

Physical and Chemical Properties

Slowly dissolves in hydrochloric acid. Insoluble in water, nitric and sulfuric acid

Composition MnO2
CAS 1313-13-9
Density 3.125 g/ml
Molecular Weight mol. wt. = 86.94

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5770
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
  • Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
  • Pam Hatchfield, Pollutants in the Museum Environment, Archetype Press, London, 2002