CAS Number: 1313-13-9
Linear Formula: MnO2
Molecular Weight: 86.94
IUPAC Name: Manganese(IV) oxide
Other Names: Pyrolusite, hyperoxide of manganese, black oxide of manganese, manganic oxide
Manganese(IV) oxide is the inorganic compound with the formula MnO2. This blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese and a component of manganese nodules.
The principal use for MnO2 is for dry-cell battaries, such as the alkaline battery and the zinc-carbon battery.
MnO2 is also used as a pigment and as a precursor to other manganese compounds, such as KMnO4.
It is used as a reagent in organic synthesis, for example, for the oxidation of allylic alcohols.
