Manganese Dioxide
MnO2, Manganic Oxide
- CAS
- 1313-13-9
- EC
- 215-202-6
- Sectors
- Electronics & Solar PV, Water & Wastewater Treatment, Building & Construction
Manganese Dioxide (CAS 1313-13-9) is an inorganic manganese oxide that occurs naturally as the mineral pyrolusite and is supplied as a dark brown to black crystalline powder, valued for its strong oxidizing capacity and used in batteries, glass and ceramics, and wastewater treatment. It occurs naturally as pyrolusite and is synthetically produced for controlled purity.
Typical Properties
| Molecular formula | MnO2 |
|---|---|
| Molecular weight | 86.94 g/mol |
| Form | powder |
| Color | gray |
| Melting point | 553 °C (decomp) |
| Density | 5.0 g/cm³ |
| Water solubility | insoluble |
| GHS signal word | Danger · Irritant / harmful, Health hazard |
| HS code | 28201000 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Manganese Dioxide
Applications
Used in alkaline and zinc-carbon batteries as a depolarizer, in glass and ceramics as a colorant and decolorizer, and in wastewater treatment as an oxidant. Also serves as a catalyst in organic synthesis and chlorine production.
Safety & Risks
Inhalation of dust may cause irritation or chronic manganese exposure; use respiratory protection and handle in ventilated areas.
Packaging
Delivered in 25 kg multiwall bags or fiber drums. Store cool, dry, and sealed to prevent contamination.