IUPAC Name
Dioxomanganese
Cas Number
1313-13-9
HS Code
28201000
Formula
MnO2
Industry
Water Treatment Chemicals
Appearance
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
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
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.
