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China Phosphating Grade Manganese Carbonate Suppliers - Quality Products from Trusted Factory
Physical and Chemical Properties
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Formula & Weight: Molecular formula: MnCO3, molecular weight: 114.95, CAS number: 598-62-9
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Appearance: Light pink to light brown powder, in the form of rose colored triangular diamond crystals or amorphous powder
Solubility: Almost insoluble in water, slightly soluble in carbonic acid, insoluble in alcohols and liquid ammonia, soluble in dilute inorganic acids; Dissolved in phosphoric acid solution, clear and transparent, without precipitation.
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Stability: Stable in dry air, prone to oxidation and discoloration in humid environments; Thermal decomposition generates manganese oxide and carbon dioxide, which undergo hydrolysis/reaction under boiling water or strong alkaline conditions.
Quality Indicators (HG/4203-2011 Standard)
| Items | Specifications |
|---|---|
| Appearance | Light pink to light brown powder |
| Mn Content (%) | ≥44.0 |
| Sulfate Content (%) | ≤0.50 |
| Chloride Content (%) | ≤0.05 |
| Heavy Metals (as Pb, %) | ≤0.05 |
| Iron (Fe) Content (%) | ≤0.05 |
| Nitrate Insoluble Matter (%) | ≤0.10 |
| Phosphoric Acid Solubility Test | Clear solution without precipitate |
Applications
Core Application: Metal Surface Phosphating Treatment
As a key raw material for manganese based phosphating solution, generating dense manganese based phosphate film, significantly improving the corrosion resistance, wear resistance and paint film adhesion of workpieces. Widely used in black phosphating processes such as automotive gears, fasteners, bearings, mechanical components, etc.
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Auxiliary Uses: High-end ceramic glazes, electronic grade manganese salt precursors, alloy additives, etc.
Packaging, Storage and Transportation
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Packaging: Packed in woven bags lined with polyethylene plastic bags, net weight 25kg per bag. Double-layer moisture-proof sealed packaging is used for part of the products.
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Storage: Store in a cool, ventilated and dry warehouse. Keep away from moisture, light and oxidation. Do not store together with acidic materials and avoid dust contamination.
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Transportation: Protect from rain and direct sunlight. Handle with care during loading and unloading to prevent package damage. Keep dry during transportation, as moisture will directly affect the phosphating performance.
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Fire Control: In case of fire, use water, sand or fire extinguishers for fire fighting.
Frequently Asked Questions
What is the CAS number and molecular weight of Manganese Carbonate?
The CAS number is 598-62-9 and the molecular weight is 114.95.
Is Manganese Carbonate soluble in water?
No, it is almost insoluble in water and alcohols, but it is soluble in dilute inorganic acids.
What are the primary industrial applications for this product?
The core application is in metal surface phosphating treatment, especially for automotive gears, bearings, and mechanical components to improve corrosion resistance.
What is the standard manganese (Mn) content in your specifications?
Based on the HG/4203-2011 standard, the Mn content is ≥44.0%.
How should the product be stored to ensure stability?
It should be stored in a cool, dry, and ventilated warehouse, protected from moisture and oxidation, as humid environments can cause discoloration.
What is the standard packaging size for shipping?
It is typically packed in 25kg net weight woven bags with polyethylene plastic liners.