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Manganese Dioxide
- Origin
- : China
- CAS Number
- : 1313-13-9
- HS Code
- : 28201000
Basic Info
- IUPAC Name
- : manganese(IV) oxide
- Molecular Formula
- : MnO2
- Molecular Weight (g/mol)
- : 86.9400
- Synonyms & Trade Names
- : Manganese dioxide; Pyrolusite; MnO2
- Purity / Assay (%)
- : 85% min MnO2
- Grade / Quality Level
- : Technical Grade
- Physical Form
- : Solid
- Concentration
- : Pure substance
- Appearance / Color
- : White to off-white solid
- Odor
- : Odorless
- Melting Point (°C)
- : 535.0000
- Boiling Point (°C)
- : 535 (decomposes)
- Density (g/cm³)
- : 5.0300
- Solubility in Water
- : Insoluble
- Signal Word
- : Warning
- GHS Hazard Class
- : Oxidizer; Skin irritant; Respiratory irritant
- H-Statements
- : H272|H302|H332|H373
- P-Statements
- : P210|P220|P221|P260|P270|P271
- REACH Status
- : Registered
- Drug Precursor Status
- : Non-precursor
- Storage Class (GHS)
- : 5.1
- Storage Conditions
- : Cool, dry; away from combustibles; oxidizer
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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.