Manganese Dioxide, MnO2

70% - 90% pure

Applications:

Manganese dioxide is a versatile, black or dark grey chemical compound with the CAS number 1313-13-9, known for its strong oxidizing and catalytic properties. It is used across various industries, including: 

  • Ferroalloys: It is used in the manufacturing of ferro-manganese, which strengthens steel and removes impurities like sulfur and phosphorus.
  • Ceramics and glass: As a pigment, it can produce colors ranging from purple and brown to black. Historically known as "glassmakers' soap," it is also used to decolorize glass by neutralizing the greenish tint caused by iron impurities.
  • Batteries: A primary application is in dry-cell batteries, including zinc-carbon and alkaline batteries, where it acts as a depolarizer. High-purity electrolytic manganese dioxide (EMD) is required for these uses.
  • Chemical production: It serves as an oxidizing agent in organic synthesis and as a catalyst in the production of chemicals like sulfuric acid. It is also a precursor for other manganese compounds, such as potassium permanganate.
  • Pigments: In addition to ceramics, MnO2 is used as a pigment in paints, glazes, and mortars.
  • Pesticides: It can be found as a component in certain pesticides.
  • Water treatment: Manganese dioxide media are used to filter and remove iron, manganese, arsenic, and hydrogen sulfide from water.
  • Other applications: MnO2 also sees use in photographic chemicals and aromatic chemicals. 

 

Physical Properties:

   Formula                                      MnO2

   CAS Number                             [1313-13-9]

   UN Number                               1479

   Melting Point                             535oC

   Density                                       5.026 gm/ml

   Color                                           Gray - Black

   Odor                                            Odorless

   Appearance                               Free-flowing powder

   

Impurity Limits Specifications:

  MnO2     Fe        SiO2

   65 - 70%    7.0         7.0

   74 - 78%     6.0        5.0

   80 - 82%    5.0         5.0

   84 - 86%    3.0         3.0

   86 - 88%    2.0         2.0

   

Mesh: 80 - to 300 mesh

Purities of 99% - 99.9% also available