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Phosphating Grade Manganese Carbonate
Physical and chemical properties
Molecular formula: MnCO3, molecular weight: 114.95, CAS number: 598-62-9
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
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 conditions1. Physical and chemical properties
Quality indicators (refer to 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
Auxiliary uses: high-end ceramic glazes, electronic grade manganese salt precursors, alloy additives, etc
Packaging, storage and transportation
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.
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.
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.
Fire Control: In case of fire, use water, sand or fire extinguishers for fire fighting.