Manganese Dioxide Powder – 4 oz (300 Mesh) | High-Purity Oxidizing Agent for Gold & Silver Refining

Manganese Dioxide (MnO₂) is an essential oxidizing compound used in precious metal refining, smelting, and recovery processes. This fine 300-mesh powder is a high-purity industrial-grade reagent designed for consistent performance in gold and silver precipitation, flux preparation, and chemical refining reactions.

In refining, Manganese Dioxide acts as a powerful oxidizer, helping to break down base metals, remove impurities, and assist in converting dissolved precious metals back into solid form. It also serves as a catalyst and decolorizer, improving clarity and purity during recovery.

Key Benefits for Refiners

High-Purity Industrial Grade MnO₂ – ideal for refining, smelting, and metal purification

Consistent Fine Powder (300 Mesh) – mixes evenly with other chemicals and fluxes

Oxidizing Agent – assists in breaking down base metals and precipitating gold and silver

Catalyst and Scavenger – removes unwanted elements and color impurities in refining baths

Versatile Use – compatible with aqua regia, nitric-based, and alternative refining systems

Common Refining Applications

Gold and silver precipitation and purification

Flux component in high-temperature smelting operations

Oxidizer for removing trace impurities from solution

Catalyst in chemical reactions for metal recovery

Decolorizer and scavenger in refining baths and electrolytes

Product Details

Chemical Name: Manganese Dioxide

Formula: MnO₂

CAS Number: 1313-13-9

Mesh Size: 300 (fine powder)

Weight: 4 oz (113 g)

Form: Black powder

Packaging: Moisture-resistant resealable bag

Country of Origin: USA

Additional Uses

While primarily valued in precious metal refining, MnO₂ also has wide applications in ceramic glazes, pigments, batteries, laboratory catalysts, and water purification.

Safety Note

For professional and industrial use only. Avoid inhalation and skin contact. Use in a well-ventilated area with appropriate protective gear.