Manganese Dioxide

IUPAC Name	: Dioxomanganese
Cas Number	: 1313-13-9
HS Code	: 28201000
Formula	: MnO₂

Basic Info

Appearance Name	: Black or Silver Crystals or Powder
Common Names	: Mn-O2, beta-manganese dioxide, manganese(IV) oxide, black manganese oxide, manganese oxide, dioxomanganese, manganese binoxide, diketomanganese, manganese superoxide, manganese peroxide, Bog manganese, Braustein, Bruinsteen, cement black, C.I. 77728, C.I
Packaging	: 25kg or 50kg plastic woven bags lined with plastic bags

Industry

Water Treatment Chemicals

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Technical Document

Brief Overview

Manganese dioxide is an inorganic compound with the formula MnO₂. It is a blackish or brown solid. The main ore of manganese, mineral pyrolusite, which is a naturally a occurring manganese species, is attractive for its ability to attract heavy metals, such as iron and manganese as well as for the co-precipitation of arsenic.

Manufacturing Process

Manganese dioxide is produced by mixing a manganous salt with alkali metal permanganate and/or ammonium permanganate. Reaction mixture is then heated to about 150°C in atmosphere containing oxygen until more than 85% of the manganous salt is converted to manganese dioxide and then further elevating the temperature to about 250°C.

Metallurgy Industry

Manganese dioxide is used in metallurgy industry as a melting agent in welding fluxes, electrode coatings and casting powders; to prevent absorption of manganese from the metal by the slag; improves the adhesion between the metal and the enamel top layer.

Electrical Industry

MnO₂ is used for dry cell batteries, such as the alkaline battery and the zinc-carbon battery.

Glass Industry

In the glass industry, it is used as colour pigment for purple and black glass, it promotes oxidation of organic components.

Construction Industry

In the construction industry, MnO₂ is used for the production of sand and cement, as a pigment for concrete.

Other Applications

Manganese dioxide is used as a drying agent; it catalyzes the oxidation of oils in paints and varnishes.