Manganese dioxide
Description
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
Risks
- 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