Manganese dioxide

Manganese dioxide

Manganese(IV) oxide; Pyrolusite; Manganic oxide; Manganese peroxide

CAS 1313-13-9

Chemical Formula MnO₂

Molecular Weight 86.94 g/mol

Manganese dioxide is a black, inorganic compound widely used in battery manufacturing, particularly in dry cell batteries. It also serves as a pigment, a depolarizer, and a catalyst in chemical reactions and water treatment processes.

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Industrial Uses

1. Water Treatment 

  • Filtration Media for Iron & Manganese Removal: MnO₂ oxidizes soluble Fe²⁺ and Mn²⁺ into insoluble oxides, which are then removed via filtration. This is widely used in municipal and well water treatment.
  • Sulfide and Arsenic Removal: It can also oxidize hydrogen sulfide (H₂S) and reduce arsenic contamination by converting it into a filterable form.

2. Agrochemicals

  • Micronutrient Source in Fertilizers: Used in trace amounts to supply manganese, an essential micronutrient that supports enzyme activity, photosynthesis, and nitrogen metabolism in crops.
  • Soil Conditioner: Applied to correct manganese-deficient soils, especially for cereal crops and legumes.

3. Performance Chemicals

  • Oxidizing Agent in Organic Synthesis: MnO₂ is used to oxidize allylic and benzylic alcohols into aldehydes or ketones in selective organic transformations.
  • Manufacturing of Potassium Permanganate: Acts as the starting raw material in the production of KMnO₄, a strong oxidizer used in pharmaceuticals, disinfection, and analytical chemistry.

4.  Energy 

  • Component in Supercapacitors and Li-ion Batteries: Due to its high surface area and redox properties, MnO₂ is under development as an electrode material in supercapacitors and next-gen lithium or sodium-ion batteries.
  • Magnetoresistive and Piezoelectric Devices: Incorporated into specialized electronic ceramics and components where manganese enhances sensitivity and performance.

5. Paints, Coatings & Adhesives

  • Inorganic Black/Brown Pigment: MnO₂ is used as a stable pigment in industrial paints and coatings to create earthy tones with excellent UV resistance and thermal stability.
  • Protective Coatings: Applied in specialized coatings to enhance oxidation resistance and act as a primer in steel applications.

Specifications

Assay Typically ≥ 90% (technical grade); ≥ 99% (high purity grade)
Appearance Brown-black or dark gray powder
Odor Odorless
Boiling Point Decomposes before boiling
Melting Point ~535 °C (decomposes)
Density 5.03 g/cm³
Solubility Insoluble in water; soluble in acids with decomposition
Viscosity Not applicable (solid)
Flash Point Not flammable; not applicable

FAQs

1. What is the current price of Manganese dioxide in India?
The price Manganese dioxide can vary based on factors such as purity, quantity, etc. For the most accurate and competitive pricing, please contact us at +91.6301 00 6301 directly for a customized quote tailored to your needs.

2. Where can I buy Manganese dioxide in India?
You can purchase Manganese dioxide from MULTICHEM, a leading exporter with a reputation for quality and reliability. We provide convenient options for bulk orders and direct shipments across global markets. For more details on how to place an order, please visit our website or contact our sales team.

3. What is the minimum order quantity (MOQ) for Manganese dioxide? 
Our minimum order quantity (MOQ) Manganese dioxide is designed to cater to both small-scale and large-scale needs. The MOQ depends on the packing size of the product which could range from 25 kg to 250kg.

4. How can I ensure the quality of Manganese dioxide supplied by Multichem?                   
We adhere to stringent quality control processes to ensure that our products meet the highest standards of purity and effectiveness. They undergo rigorous testing and quality checks to guarantee that they comply with industry specifications. We provide a Certificate of Analysis (CoA) with every shipment to ensure transparency and quality assurance.