Tlenek manganu (IV) Ditlenek manganu - 500g

Manganese(IV) Oxide (Manganese Dioxide)

Other Names: Manganese dioxide, Pyrolusite, MnO₂
Chemical Formula: MnO₂
Molar Mass: 86.94 g/mol
CAS Number: 1313-13-9
Appearance: Dark brown to black powder
Odor: Odorless

Manganese dioxide is a black, inorganic compound commonly used as a strong oxidizing agent in chemical reactions and industrial applications. It naturally occurs as the mineral pyrolusite and is a key material in battery technology, glass production, and organic synthesis.

Chemical and Physical Properties

• Density: ~5.03 g/cm³

• Melting Point: ~535 °C (decomposes)

• Boiling Point: Not applicable (decomposes)

• Solubility: Insoluble in water; soluble in concentrated acids

• Reactivity: Reacts with reducing agents, strong acids, and hydrogen peroxide

• Conductivity: Semiconducting properties

Applications

• Battery Industry: Widely used as a cathode material in dry-cell batteries, especially alkaline and zinc-carbon types.

• Oxidizing Agent: Applied in laboratory and industrial redox reactions, such as oxidation of alcohols and dehydrogenation processes.

• Glass and Ceramics: Used to remove color from glass and to produce violet and brown tints.

• Water Treatment: Involved in iron and manganese removal from water supplies.

• Welding and Alloys: Serves as a component in welding fluxes and metal alloys.

• Catalysis: Functions as a heterogeneous catalyst in decomposition of hydrogen peroxide and other oxidation reactions.

Safety

Signal Word: ⚠️ Warning

Hazard Statements:

• H302: Harmful if swallowed

• H373: May cause damage to organs through prolonged or repeated exposure

Precautionary Statements:

• P260: Do not breathe dust

• P264: Wash thoroughly after handling

• P270: Do not eat, drink or smoke when using this product

• P280: Wear protective gloves and eye/face protection

• P301+P312: IF SWALLOWED: Call a POISON CENTER or doctor if you feel unwell

• P501: Dispose of contents/container in accordance with local regulations

Handling and Storage

• Handling: Avoid generation of dust. Use proper ventilation and PPE in bulk handling.

• Storage: Store in a cool, dry, well-ventilated area away from strong reducing agents and acids.

Environmental Considerations

Manganese compounds can be hazardous in high concentrations. Prevent large releases into soil and water. Dispose of waste through approved hazardous material collection services.